Tuesday, July 8, 2025

The Power of Cold Storage ๐Ÿ” Keep Your Cryptocurrency Safe from Threats

As digital assets grow in value and popularity, the importance of securing them properly becomes more urgent. Cold storage is the gold standard in protecting cryptocurrency from online threats. Whether you're a long-term holder or just getting started, understanding the power of a cold wallet can help you avoid costly mistakes. At bitwallets.org, we guide users in setting up effective cold cryptocurrency storage options—including paper wallets, air-gapped devices, and deep cold storage methods.


๐Ÿ’ก What Is Cold Storage?

Cold storage means keeping your private keys and crypto wallet offline. This significantly reduces your exposure to online threats like phishing, malware, and exchange hacks.

Unlike hot wallets that stay connected to the internet, a cold storage wallet remains offline, making it the most secure form of cryptocurrency cold storage.


๐Ÿ” How Cold Storage Works

Cold wallet security comes from isolation. Here's how it functions:

  • Your private key is generated and stored using a cold method (e.g., a paper wallet or air-gapped device).

  • The key is never exposed online, protecting it from hackers.

  • Access to funds requires physically retrieving and importing the private key to a trusted offline environment.

  • Often combined with deep cold storage, where the device or key is stored in a secure physical location.

This process ensures complete offline key storage and maximizes private key protection.


⚖️ Cold vs Hot Wallet: What's Safer?

FeatureCold WalletHot Wallet
ConnectivityOffline (air-gapped)Online
Private Key ExposureNone (cold private key storage)Exposed to the internet
UsabilityBest for savingBest for spending/trading
Risk of TheftVery low (hacker protection)High
Storage TypeNon-custodial or custodial storageOften custodial

For those serious about secure crypto storage, cold wallets are the obvious choice.


๐Ÿงพ Best Cold Wallet Types You Can Use

At bitwallets.org, we offer information and services to help you select the best cold wallet types:

  1. Paper Wallet – A printed sheet with your public and private keys, simple yet highly secure.

  2. Sound Wallet – Your key encoded in sound files and stored in media.

  3. Air-Gapped Device – A computer or hardware wallet never connected to the internet.

  4. Deep Cold Storage – Long-term secure storage in physically protected environments.

  5. Custodial Storage – A service stores your crypto for you (trusted third-party).

  6. Non-Custodial Storage – You have full control and responsibility over your wallet.

Each offers different levels of theft protection and convenience.


✅ Why Use Cold Storage?

There are many reasons to use cold storage for cryptocurrency, especially if you're holding a significant amount. Benefits include:

  • ๐Ÿ” Private key protection

  • ๐Ÿ›ก️ Prevent key theft

  • ๐ŸงŠ Cold cryptocurrency storage for long-term holding

  • ๐Ÿ’ผ Non-custodial storage gives you full control

  • ๐Ÿ”’ Hacker protection through true offline status

Whether it's a simple paper wallet or a robust deep cold storage setup, the goal is the same—keep your digital wealth safe.


๐Ÿงฐ Cold Wallet Tools from bitwallets.org

At bitwallets.org, we offer all the tools you need to start storing your crypto offline:

  • Secure paper wallet generators

  • Tutorials on how cold storage works

  • Step-by-step guides on using air-gapped devices

  • Educational content comparing cold vs hot wallets

  • Resources to help you choose between custodial and non-custodial storage

Our mission is to help crypto users of all levels protect their assets through reliable cold wallet solutions.


Ready to secure your cryptocurrency the smart way?
➡️ Visit bitwallets.org and explore the safest way to store crypto—offline.

Monday, July 7, 2025

Generate a Secure Bitcoin Paper Wallet with Bitwallets.org ๐Ÿ”’ Take Control of Your Crypto

In a time when centralized exchanges can freeze withdrawals, mobile wallets can be hacked, and phishing scams are rampant, one solution remains time-tested and resilient: the Bitcoin paper wallet.

If you're serious about protecting your Bitcoin, Bitwallets.org offers the tools and knowledge to generate a Bitcoin wallet offline, store it safely, and eliminate digital vulnerabilities—without compromising ease of use.


๐Ÿ’ก What Is a Bitcoin Paper Wallet and Why Use It?

A Bitcoin paper wallet is a physical printout containing your Bitcoin private key and Bitcoin public key. Since it’s completely offline, it offers true cold storage wallet security—making it immune to online threats.

At Bitwallets.org, you can:

  • Create a secure Bitcoin wallet from scratch

  • Use a client-side Bitcoin address generator to stay offline

  • Customize and print beautifully designed wallets

  • Store your Bitcoin without relying on third-party services


๐Ÿ›  How to Make a Bitcoin Paper Wallet

Bitwallets.org simplifies the process of how to make a Bitcoin paper wallet, giving users complete control in just a few easy steps:

Step-by-step Guide:

  1. Visit Bitwallets.org and download the wallet generator HTML file.

  2. Disconnect your computer from the internet.

  3. Open the file locally in your browser.

  4. Click to generate Bitcoin address and Bitcoin private key.

  5. Print the wallet or write the keys down by hand.

  6. Store in a safe, fireproof location or safety deposit box.

This entire process happens offline, protecting your keys from hackers and malicious software.


๐Ÿง  Features for Advanced Users

Bitwallets.org isn’t just for beginners—it also supports advanced features like:

  • ๐Ÿ” BIP38 encryption: Encrypt your private key with a password for an extra layer of protection.

  • ๐Ÿง  Brain wallet: Memorize a passphrase and regenerate your Bitcoin key pair anytime.

  • ๐Ÿ’พ WIF (Wallet Import Format): Compatible with most Bitcoin wallets for easy importing.

  • ๐Ÿ”„ Compressed Bitcoin key support: Ideal for SegWit and modern address formats.

  • ๐Ÿ” Elliptic Curve Cryptography Bitcoin-based keys for robust mathematical security.

These features make Bitwallets.org the perfect open-source Bitcoin wallet generator for both novices and pros.


๐ŸŒ Open-Source, Client-Side, and Private by Design

What makes Bitwallets.org stand out?

  • Open-source JavaScript wallet: You can inspect the code yourself.

  • Client-side Bitcoin address generator: No data ever leaves your device.

  • Generate Bitcoin wallet offline: Works without internet access for true cold storage.

  • Printable Bitcoin wallet templates: Professional designs for gifting or storing.

Unlike centralized services, Bitwallets.org never sees your keys. You're in full control from start to finish.


๐Ÿ” Why You Should Securely Store Bitcoin Offline

Online wallets, exchanges, and apps are always vulnerable to:

  • Data breaches

  • Insider threats

  • Platform outages

  • SIM-swap attacks

  • Malware and keyloggers

By switching to an offline Bitcoin wallet, you can:

  • Securely store Bitcoin for the long term

  • Avoid third-party custodians

  • Reduce attack surface to nearly zero

  • Maintain complete ownership of your funds

Bitwallets.org empowers users to create Bitcoin wallets for cold storage easily and securely.


๐ŸŽ Perfect for Gifts, HODLing, or Estate Planning

Whether you’re:

  • Gifting someone their first Bitcoin

  • Creating a family trust

  • Storing Bitcoin for retirement

…a printable Bitcoin wallet from Bitwallets.org offers a physical, verifiable way to store and transfer value.

You can create a Bitcoin wallet, seal it in an envelope, and rest easy knowing it’s safe from digital threats.


๐Ÿš€ Start Creating Your Wallet Today at Bitwallets.org

Bitwallets.org is built for those who want:

  • A Bitcoin wallet generator they can trust

  • Tools to generate Bitcoin address and key pairs safely

  • The ability to store Bitcoin offline with no technical hassle

  • Complete privacy through a client-side, open-source experience

Don’t leave your Bitcoin on an exchange or in a hot wallet.
Visit Bitwallets.org today and create a truly secure Bitcoin wallet—your keys, your coins.

Sunday, July 6, 2025

Bitcoin Wallet Card – The Complete Printable Wallet with Public & Private Keys

As Bitcoin adoption grows, the need for secure and offline storage methods has never been greater. The Bitcoin wallet card is a powerful solution that offers both security and simplicity. It’s a complete Bitcoin wallet—with both your public address and private key—printed on a card you can hold, store, or gift.

At Bitwallets.org, we offer an easy way to generate, print, and use Bitcoin wallet cards for cold storage or personal gifts.


What Is a Bitcoin Wallet Card?

A Bitcoin wallet card is a physical wallet that contains:

  • Your public Bitcoin address (to receive funds)

  • Your private key (to access or send funds)

  • QR codes for both keys for easy scanning

  • A printable or card-style format for safe offline storage

This makes it a fully functional wallet without needing apps, hardware, or online platforms. Wallet cards are a form of cold storage, ideal for both long-term investors and casual users looking to gift or secure Bitcoin.


Why Use a Bitcoin Wallet Card?

๐Ÿ” Full Key Control

You get both public and private keys, so you're always in full control of your funds—without relying on centralized exchanges or custodial wallets.

๐ŸŽ Easy and Elegant Gifting

Giving Bitcoin is easy with a wallet card. Just print, load with BTC, and hand it over. Great for birthdays, weddings, or giveaways.

๐ŸงŠ True Cold Storage

No internet, no cloud, no tracking. Just pure offline security that protects your assets from hacking or malware.

๐Ÿ–จ️ Simple to Print and Use

Our printable Bitcoin wallet cards come in PDF or card-ready formats. You can create and print your own wallet in minutes.


How It Works at Bitwallets.org

Creating a Bitcoin wallet card at Bitwallets.org is fast and secure:

  1. Visit Bitwallets.org

  2. Use our offline Bitcoin wallet generator

  3. Generate a new wallet with both public & private keys

  4. Print the wallet on paper or plastic card

  5. Store it securely or gift it to someone special

๐Ÿ›ก️ Security Tip: Always generate your wallet offline and never store your private key on any internet-connected device.


What’s on the Wallet Card?

Each card generated at Bitwallets.org includes:

  • Public Bitcoin Address (share this to receive funds)

  • Private Key (keep this secret to access your funds)

  • QR Codes for quick scans with any wallet app

  • Optional Custom Design – Personalize it for gifts or branding

This makes the wallet card a self-contained, offline Bitcoin wallet.


Popular Uses for Bitcoin Wallet Cards

  • Cold Storage for HODLers
    Store your BTC long-term without relying on exchanges or apps.

  • Gifting Bitcoin
    A unique way to give real value on birthdays, holidays, weddings, or baby showers.

  • Crypto Promotions
    Use wallet cards for giveaways, promotions, or branding with your business.

  • Educational Tools
    Teach crypto basics using physical wallets that demonstrate how keys work.


Why Choose Bitwallets.org?

Bitwallets.org is your go-to platform for secure, printable Bitcoin wallets. We provide:

  • ✅ Offline wallet generation for maximum security

  • ✅ Free printable templates and QR code support

  • ✅ Card-size formatting for convenient use and storage

  • ✅ No data collection – we never store your keys

  • ✅ Optional physical card printing and design customization

Whether you’re securing thousands in Bitcoin or giving $20 worth as a gift, our tools put you in complete control.


Final Thoughts

If you're looking for a simple, safe, and smart way to store or share Bitcoin, the Bitcoin wallet card is the perfect solution. It offers full ownership, no third-party risk, and an elegant format for both storage and gifting.

๐ŸŽฏ Visit Bitwallets.org today to create and print your own Bitcoin wallet card—complete with public and private keys, ready to hold real value.

Protect your crypto. Gift Bitcoin with style.
Start now at Bitwallets.org.

Friday, July 4, 2025

The Smart Way to Secure and Store Your Bitcoin Offline - Bitwallets.org

As the world embraces decentralized finance, the need for secure and reliable crypto storage solutions is greater than ever. Bitwallets.org offers a powerful answer: a Card Wallet with your Bitcoin wallet keys printed on a durable, tamper-proof paper or plastic card. It’s the ideal physical cold-storage solution for Bitcoin, engineered for offline, long-term storage.

This isn’t just a product—it’s a shift in how people store Bitcoin securely, independently, and with complete peace of mind.


Why Choose Bitwallets.org for Bitcoin Cold Storage?

Our Bitcoin cold storage wallet offers features unmatched in both convenience and security:

  • Tamper-proof and forgery-proof design

  • Military grade encryption

  • Secure Entropy Technology for decentralized key generation

  • Hologram protected crypto card

  • Designed for global access with universal compatibility with any wallet provider

Unlike standard wallets or mobile apps, Bitwallets.org's offline Bitcoin storage solution removes the risk of online attacks or hardware failures. It’s a simple, effective, and low-tech way to store high-tech wealth.


A Professional Cold Storage Solution for Everyone

Whether you’re a seasoned crypto holder or a newcomer to digital assets, Bitwallets.org provides a professional cold storage solution that’s:

  • Anonymous and secure

  • Completely offline – a no internet access wallet

  • Ideal for Bitcoin backup or secure crypto gifting

  • An excellent hardware wallet alternative

Our private key storage card offers unmatched ease-of-use, making it a top choice for individuals, businesses, and institutions alike.


Built for Long-Term Protection and Global Trust

Bitwallets.org combines security and simplicity. Whether you're gifting Bitcoin, storing savings, or building a long-term digital estate, our Card Wallet for crypto is:

  • A trusted tool across Europe and beyond

  • A printed crypto wallet that’s easy to use and carry

  • A crypto card made in Austria—built with precision and integrity

With global access and complete wallet provider compatibility, this wallet adapts to your needs, wherever you are.


Your Bitcoin Deserves the Highest Security

Don’t wait for a hack, device loss, or technical failure to rethink your crypto strategy. Choose Bitwallets.org to buy a cold wallet for Bitcoin and protect your digital assets the smart way.

Visit bitwallets.org to secure your easy-to-use cold wallet today.

Thursday, July 3, 2025

Personalized Bitcoin Paper Wallets – Secure Your Crypto or Gift It in Style

Looking for a secure and personal way to store or gift Bitcoin? At BitWallets.org, we offer high-quality, custom Bitcoin paper wallets designed for cold storage, gifting, and every celebration in between.

Whether you’re preparing a Bitcoin wallet gift for the holidays or protecting your long-term investment with offline storage, our solutions are built for both security and style.


๐Ÿงพ What is a Bitcoin Paper Wallet?

A Bitcoin paper wallet is a simple yet powerful way to store your cryptocurrency offline. It includes your public and private keys, usually in QR code format, printed on paper. This makes it a highly secure cold storage bitcoin wallet — completely disconnected from the internet.

It’s an ideal option for:

  • Long-term holders of Bitcoin

  • Crypto gifting

  • Offline storage to avoid hacks or malware

  • Those who prefer physical bitcoin wallets


๐ŸŽ Custom Designs for Every Occasion

At BitWallets.org, we believe cold storage should never be boring. We provide beautifully designed, custom bitcoin paper wallets that celebrate key holidays and events:

  • ๐ŸŽ… Christmas Bitcoin Wallets – festive and secure

  • ๐ŸŽƒ Halloween Paper Wallets – spooky and stylish

  • ๐ŸŽ‰ New Year Bitcoin Wallets – start the year with crypto

  • ๐ŸŽ Birthday and Special Event Wallets – the perfect gift

Every design is printable or can be shipped as a physical bitcoin wallet for collectors and gifters alike.


๐Ÿ›’ Why Buy Bitcoin Paper Wallets from BitWallets.org?

We make it easy to buy bitcoin paper wallets that are both functional and visually appealing.

Here’s what makes our wallets stand out:

  • Printable bitcoin wallet templates (instant download)

  • Custom bitcoin paper wallet orders with name, message, or design

  • Bitcoin cold storage paper wallet options for long-term safekeeping

  • Handmade bitcoin wallet paper for premium presentations

  • Full guidance on how to store bitcoin offline safely

  • Perfect for beginners, educators, and crypto gift-givers


๐Ÿง  Who Are Our Wallets For?

Our wallets are designed for everyone — whether you're new to crypto or a veteran investor.

Ideal for:

  • First-time users looking for a bitcoin paper wallet for beginners

  • Gifting bitcoin to friends, family, or coworkers

  • Teaching others about crypto with a printable cryptocurrency wallet template

  • Securely holding Bitcoin offline with a cold storage bitcoin wallet

  • Adding flair with unique bitcoin wallet designs


๐Ÿ” Offline Security You Can Trust

Worried about security? So are we — that’s why we focus on true cold storage. Our secure bitcoin paper wallets are built to protect your crypto from digital threats.

We recommend:

  • Generating wallets offline only

  • Printing with a secure, private printer

  • Keeping your physical wallet in a fireproof or tamper-proof location

  • Using air-gapped devices for advanced safety

With our help, you'll know exactly how to store Bitcoin offline with peace of mind.


๐Ÿ“ฆ Where to Buy Paper Bitcoin Wallets

Wondering where to buy paper bitcoin wallets safely and quickly? Look no further.

At BitWallets.org, you can:

  • Choose a design and download instantly

  • Customize a wallet and have it shipped

  • Order bulk wallets for events, giveaways, or business gifting

  • Select premium print options for collectors

We support both digital and physical options for your convenience.


๐Ÿš€ Get Your Custom Bitcoin Wallet Today!

Whether you're securing your investment or sending crypto as a gift, BitWallets.org makes it easy, stylish, and secure. Explore our wide range of custom bitcoin paper wallets, and give your crypto the offline protection it deserves.

๐Ÿ‘‰ Visit BitWallets.org to get started today!

Wednesday, July 2, 2025

When Should You Use a Cold Storage Wallet for Bitcoin?

 

Cold wallets are ideal for anyone who:

  • Is investing long-term (HODLing)

  • Doesn’t need daily access to funds

  • Wants to gift crypto securely

  • Is planning crypto inheritance

  • Needs a cold backup for emergencies

  • Prefers air-gapped wallet security

Unlike mobile wallets, which are exposed every time you open them, cold wallets give you a set-it-and-forget-it layer of protection.


Why Cold Wallets Beat Exchanges & Hot Wallets

Exchanges are convenient but risky. If an exchange gets hacked, collapses, or freezes your account—you could lose everything. Even mobile wallets aren’t foolproof; one phishing attack or keylogger can compromise your funds.

In contrast, cold wallets:

  • Don’t rely on third parties

  • Don’t store your keys online

  • Can’t be hacked remotely

  • Offer true self-sovereignty

For the most secure crypto wallet offline, cold wallets are unmatched.


Summary: Store Your Crypto Safely with BitWallets.org

There’s no better time than now to secure your digital wealth. At BitWallets.org, we help crypto users generate Bitcoin cold storage wallets in seconds—without technical knowledge or extra cost.

Whether you're planning for the long term, gifting crypto, or setting up a secure cold backup, our printable wallets give you full control and confidence.

๐Ÿ‘‰ Visit BitWallets.org to create your secure Bitcoin paper wallet now.

Tuesday, July 1, 2025

Ultimate Guide to Cryptocurrency Security: How Bitwallets.org Protects Your Digital Assets

As the world increasingly embraces digital currencies, the need for secure cryptocurrency storage has never been more crucial. With threats like hacking, ransomware, and malware, securing your private keys and cryptocurrency wallet should be a top priority. At Bitwallets.org, we provide comprehensive cryptocurrency storage methods and solutions to protect your cryptocurrency types, such as tokens and digital currencies, from malicious actors. Whether you're new to cryptocurrency or a seasoned investor, Bitwallets.org offers everything you need to safeguard your assets with our cutting-edge services, including paper wallet creation, secure storage, and cold storage options.

Comprehensive Cryptocurrency Storage Solutions at Bitwallets.org

Bitwallets.org is your ultimate destination for secure cryptocurrency storage. Our platform offers a range of cryptocurrency wallet services designed to meet your security needs. With our easy-to-use tools, you can ensure that your private keys and public keys are always kept safe from cyberattacks and unauthorized access.

1. Paper Wallet Creation for Secure Cold Storage

A paper wallet is a popular method of storing cryptocurrency offline. At Bitwallets.org, we offer a powerful paper wallet generator that allows you to create your private keys and public keys in a secure, offline environment. The generated QR code can also be used for easy scanning and cryptocurrency transactions. Since paper wallets are completely disconnected from the internet, they are considered one of the safest ways to store your cryptocurrency, protecting it from any online threats.

Key Benefits of Using a Paper Wallet:

  • Offline storage: Keep your private keys safe from cyberattacks.

  • Low-cost solution: Unlike hardware wallets, paper wallets are free to create and store.

  • Ease of use: The QR code feature makes it simple to import your keys into your cryptocurrency wallet app.

At Bitwallets.org, we ensure that the process of paper wallet creation is simple and secure. Follow our easy steps to generate your wallet, print it, and store it safely in a fireproof and waterproof safe to ensure maximum protection.

2. Secure Cryptocurrency Storage with Offline Methods

Offline storage is one of the best ways to protect your cryptocurrency from cybersecurity threats. Bitwallets.org provides multiple offline cryptocurrency storage options, ensuring that your private keys are never exposed to potential online risks. Whether you prefer using a paper wallet or a hardware wallet, we support a variety of cryptocurrency storage methods designed for ultimate security.

  • Paper wallet: As mentioned, paper wallets are a form of cold storage, completely offline and free from digital threats.

  • Hardware wallets: A more durable option, hardware wallets store your private keys in a physical device, reducing the risk of malware infections on your devices.

Both of these methods offer significant advantages over online storage options, which can be vulnerable to cyberattacks and other threats.

3. Seed Phrase Creation for Backup and Recovery

The security of your cryptocurrency wallet heavily relies on seed phrases—the master key that allows you to restore keys if anything goes wrong. At Bitwallets.org, we make seed phrase creation easy and secure. When you create a paper wallet or any other offline storage method, we guide you on how to store your seed phrase in a separate, safe location. This ensures that even if your paper wallet is lost or damaged, you can always access your cryptocurrency with the recovery key.

4. Cryptocurrency App with Malware Detection and Device Security

Using a cryptocurrency app is an essential part of managing your cryptocurrency transactions, but ensuring that your devices are secure is just as important. Bitwallets.org provides malware detection tools and device security tips to help keep your private keys safe from malware and cyberattacks. Before generating or using a paper wallet or hardware wallet, we strongly recommend running malware scans and cache clearing on your devices to ensure that no malicious software is present.

By using our secure cryptocurrency app, you can easily import your QR codes or private keys into your wallet while ensuring the security of your transactions. Always encrypt your wallet with a PIN or password to add an extra layer of protection.

5. The Importance of Physical Storage for Paper Wallets

Storing your paper wallet securely is critical to maintaining its integrity. Paper degradation and physical damage can render your cryptocurrency wallet useless. Bitwallets.org recommends using fireproof and waterproof safes to store your paper wallets in the safest way possible. This is particularly important if you plan to store a large amount of digital currency over a long period.

By following backup precautions, including storing multiple copies of your paper wallet in different secure locations, you can ensure that your assets remain safe from theft, damage, or loss.

6. Preventing Hacking and Cyberattacks

One of the greatest threats to cryptocurrency storage is the risk of hacking and cyberattacks. Whether it’s a malicious actor exploiting vulnerabilities in your cryptocurrency app or ransomware locking you out of your wallet, Bitwallets.org is committed to helping you stay safe. Here's how:

  • Device disconnection: Before generating your paper wallet, always disconnect your device from the internet to avoid any potential cyberattacks.

  • Secure encryption: Always use encryption (PIN, password) to protect your private keys when using online wallets or apps.

  • Backup history and cache clearing: Ensure that no sensitive data, such as your private keys, is stored on your device’s cache by clearing it regularly.

By combining offline storage methods with device security practices, Bitwallets.org ensures that your private keys and cryptocurrency are safeguarded against all forms of cybersecurity threats.

7. Hardware Wallets vs Paper Wallets: What’s Right for You?

Choosing between a paper wallet and a hardware wallet depends on your storage needs:

  • Paper Wallets: Ideal for long-term storage and cold storage. Best for users who want a simple, offline solution to protect their private keys.

  • Hardware Wallets: Best for users who want a more durable, high-tech solution for cryptocurrency storage. They are slightly more convenient than paper wallets but still provide offline storage.

At Bitwallets.org, we help you weigh the pros and cons of both options, guiding you toward the best solution for your unique security needs.

Conclusion: Trust Bitwallets.org for Secure Cryptocurrency Storage

Protecting your cryptocurrency is vital in today’s digital world. Bitwallets.org offers a full range of services to help you store and manage your digital currencies securely. Whether you're using a paper wallet for cold storage or a hardware wallet for offline storage, we provide the tools and guidance you need to ensure your private keys remain safe.

From paper wallet creation and seed phrase backup to malware detection and device security, Bitwallets.org covers all aspects of cryptocurrency security. By following our secure practices and utilizing our tools, you can rest assured that your cryptocurrency storage needs are met with the highest level of protection.

Bitcoin Money Bills & Physical Bitcoin Gifts for Christmas 2026 - Crypto Paper Currency

The holiday season is the perfect time to give a gift that is unique, meaningful, and modern. In 2025, Bitcoin money bills , physical Bitcoi...