Crypto Assets (Virtual Currency) | A New Class of Assets in the Digital Era

Cryptocurrency Essentials

What are cryptocurrencies? While many have heard of Bitcoin or Ethereum, it’s common not to fully grasp what these assets truly represent.

Bitcoin has made headlines for reaching record highs, generating widespread interest. Yet, most people still lack a clear understanding of its fundamental nature and mechanics. Cryptocurrencies operate on unique value systems, distinct from fiat currency, and are traded globally around the clock—reshaping our entire perspective on finance.

This guide offers a straightforward overview of cryptocurrency fundamentals and explains how they differ from physical cash and electronic payment methods most people use daily.

Definition and Legal Classification of Crypto Assets

Crypto assets (cryptocurrencies) are digital forms of money exchanged over the internet. Japan’s Payment Services Act legally defines them by these three characteristics:

1. They can be used for payments in stores and exchanged for traditional currencies like the yen or US dollar.
2. They are digitally recorded and transferable using computers or smartphones.
3. They are not government-issued money or electronic money.

Originally referred to as "virtual currency," Japan changed the official legal term to "crypto asset" in May 2020. This update aligned Japan’s terminology with international standards and clarified the investment nature of these products.

Despite this, "virtual currency" remains common in news reports and everyday language, so both terms are still in use. Legally, "crypto asset" is the proper term, but "virtual currency" may feel more familiar to the general public.

Cryptocurrency vs. Fiat Currency

The key differences between cryptocurrencies and traditional money (like the yen or dollar) are who issues them, and how their value is guaranteed.

Since cryptocurrencies aren’t controlled by any nation or bank, they’re typically less affected by political or economic events in a single country. For instance, a country’s economic policy or political turmoil can rapidly devalue its currency, but cryptocurrencies are less exposed to such direct influence.

However, cryptocurrencies’ values can be highly volatile. Prices fluctuate based on supply and demand, investor sentiment, technological changes, and shifts in regulation. This volatility requires extra caution from investors.

Cryptocurrency vs. Electronic Money

Both cryptocurrencies and electronic money are digital, but they have key differences.

Electronic money — such as Suica, PASMO, or nanaco — is issued by specific companies and always matches its fiat money value. Charging 1,000 yen means you can spend precisely 1,000 yen’s worth.

Cryptocurrencies, by contrast, are valued by the market. Investors often buy them speculatively, and values can rise or fall quickly. A cryptocurrency bought for 10,000 yen today may be worth 12,000 yen tomorrow or drop to 8,000 yen—the volatility is a core characteristic.

The Technology Behind Cryptocurrencies

How do cryptocurrencies work behind the scenes? The foundation is a revolutionary technology called blockchain. While it may sound complicated, the basic idea is straightforward.

This section explains the core technology behind cryptocurrencies in simple language. By understanding these basics, you’ll see why cryptocurrencies are considered secure and trustworthy.

What Is Blockchain?

Most cryptocurrencies rely on blockchain technology. A blockchain is a specialized database where transaction records are grouped into "blocks"—which are then linked together in a chain.

Each block holds multiple transactions and includes information referencing the previous block. This structure makes it extremely difficult to alter past data. Attempting to rewrite one block would require simultaneously altering all subsequent blocks, which is practically impossible.

To visualize this, imagine recording transactions in a notebook. Unlike a standard notebook, with blockchain, every new page also contains a summary of the previous page. Any attempt to alter an earlier page breaks the logical chain, making tampering immediately obvious.

In essence, blockchain is a system where everyone validates records together, greatly increasing reliability and trust.

How Distributed Ledgers Work

Traditional banks centrally manage records of transactions and balances. In blockchain systems, however, many computers across the network maintain identical records—a structure called a "distributed ledger."

Major advantages include:

• System remains operational even if some nodes go offline
• Data tampering by a single party is extremely hard
• Publicly accessible records increase transparency

For example, if a bank’s server crashes, transactions can’t be processed. In a distributed ledger, thousands or even tens of thousands of computers worldwide store the same data, keeping the system running even if a portion goes down.

Tampering would require controlling most of the network’s computers at once, making unauthorized changes virtually impossible. In short, widely shared records create a more secure and trustworthy system.

Security and Trust

Blockchains use "consensus algorithms" to validate transactions—mechanisms that require network participants to agree on transaction legitimacy.

For Bitcoin, the Proof of Work (PoW) method is used: participants compete to solve complex mathematical problems, and the winner earns the right to add the next block. This process, known as mining, requires enormous computational power.

To take over the network, an attacker would need to control more than half of the total computing power—a feat that is technically and economically unfeasible given the global scale of networks like Bitcoin.

Ethereum and some other cryptocurrencies are shifting to more energy-efficient models like Proof of Stake (PoS), which allows users to participate in transaction validation by staking a certain amount of cryptocurrency as collateral.

These innovations enable users to transact securely even without a central administrator. In essence, broad community oversight prevents fraud and abuse.

Major Types of Cryptocurrencies

Tens of thousands of cryptocurrencies exist, with Bitcoin and Ethereum among the most prominent. Many people know these names, but not their differences or unique features.

This section introduces leading cryptocurrencies and explains their distinguishing traits for newcomers. Each serves different purposes and is built on unique technologies.

Bitcoin (BTC)

Bitcoin is the original cryptocurrency, proposed by the pseudonymous Satoshi Nakamoto in 2008 and launched in 2009. The foundational white paper, "Bitcoin: A Peer-to-Peer Electronic Cash System," described a system for direct value transfer without banks or other intermediaries.

Bitcoin’s defining features include:

• A fixed maximum supply of 21 million coins, creating scarcity
• New blocks are generated about every 10 minutes
• The new supply halves roughly every four years ("halving")
• The most recognized cryptocurrency with the largest market capitalization

Often called "digital gold," Bitcoin’s limited supply makes it resilient against inflation, similar to physical gold. As an asset separate from government and central banks, it’s also seen as a tool for portfolio diversification.

The Bitcoin halving event reduces the number of new coins issued, increasing scarcity and drawing significant market attention each time it occurs.

Ethereum (ETH)

Launched in 2015 by Vitalik Buterin, Ethereum is both a cryptocurrency and a programmable platform. While Bitcoin serves as digital money, Ethereum introduced "smart contracts," a breakthrough feature.

Smart contracts are self-executing agreements: when specified conditions are met (for example, "if A, then B"), the contract automatically enacts the agreed outcome. This enables transactions like "automatic payment upon delivery," all without human involvement.

Smart contracts power a wide range of decentralized applications (DApps), from finance and gaming to digital art and more.

Ethereum’s key features include:

• Ability to develop diverse applications via smart contracts
• Foundation for DeFi (decentralized finance) and NFTs (digital ownership)
• No maximum supply—issuance is variable
• Second-largest market capitalization after Bitcoin

Ethereum is more than a digital currency—it’s a robust ecosystem for decentralized applications and innovation.

Other Major Cryptocurrencies (Altcoins)

All cryptocurrencies other than Bitcoin are collectively called "altcoins," each with unique features and purposes.

• XRP: Developed by Ripple, XRP is designed for cross-border payments. It’s much faster and cheaper than traditional bank transfers—settlements typically complete within seconds or minutes. XRP is particularly focused on use by financial institutions for international transfers.

• Solana: Renowned for high throughput and low fees, Solana can process tens of thousands of transactions per second. Its speed and efficiency make it a popular platform for DeFi and NFT projects.

• Cardano: A third-generation blockchain developed through academic research, Cardano prioritizes security and sustainability. It uses an energy-efficient Proof of Stake model to minimize environmental impact.

• Dogecoin: Created as an internet meme, Dogecoin gained value through celebrity endorsements and a vibrant community. It’s often used for micro-tipping and has a friendly, accessible image.

Each altcoin brings its own strengths and use cases. Understanding these differences is essential for informed investment and use.

Key Features and Benefits of Cryptocurrencies

How do cryptocurrencies outperform traditional money? Here, we connect their advantages to real-life situations.

Cryptocurrencies can do things banks and cash cannot. Understanding these benefits reveals why crypto continues to draw global attention.

Cross-Border Transfers and Payments

A core advantage of cryptocurrencies is seamless cross-border transfers. Traditional international remittances involve multiple intermediaries, high fees, and delays of several days.

For example, sending 100,000 yen from Japan to the Philippines via bank transfer might cost thousands in fees and take three to five business days to arrive, with possible extra charges from intermediary banks.

With cryptocurrency, you get:

• Transfers completed worldwide in minutes to hours
• Lower fees due to fewer intermediaries
• Access for people without bank accounts
• No delays for weekends or holidays

These qualities make cryptocurrency a popular tool for international remittances—especially in regions where banking infrastructure is limited.

Some retailers and online platforms also accept cryptocurrency payments, offering merchants lower transaction costs than credit cards.

24/7/365 Trading

Traditional assets like stocks and bonds only trade during exchange hours—for example, Japan’s stock market is open weekdays 9 a.m. to 3 p.m., and U.S. exchanges also have fixed sessions.

Cryptocurrencies, by contrast, trade globally, every hour of every day—no exceptions.

This delivers:

• Flexible investing, unconstrained by time or location
• Real-time reaction to global events
• Trading that fits any work or lifestyle
• No missed opportunities—even late at night or early morning

Busy professionals can trade at night or on weekends. When major news breaks, you can react instantly—no waiting for the market to open.

Decentralization: No Central Authority

Traditional financial systems rely on central banks or governments to manage currency, with banks and payment processors as intermediaries. Cryptocurrencies are different: they run on decentralized networks with no central administrator.

Advantages include:

• Less vulnerability to policy changes by governments or financial institutions
• Resistance to censorship or asset freezes
• Lower risk of total system failure
• High transparency via public transaction records

Political upheaval can crash a nation’s currency or shut down its banks. Crypto, as a borderless and independent asset, is less exposed to such disruptions.

All blockchain transactions are public and auditable, making fraud or manipulation easier to detect.

Reducing Transaction Costs

With no need for intermediaries, cryptocurrencies can cut costs compared with traditional finance.

Examples include:

• Lower international remittance fees
• Reduced infrastructure costs for payment processing
• Lower costs for managing and verifying transaction records
• Reduced intermediary fees

Traditional systems require banks, payment processors, and card companies—each taking a fee. Crypto can eliminate many of these intermediaries and related costs.

However, when networks are congested, fees can spike—especially for Bitcoin and Ethereum. High traffic can slow processing and require higher fees for faster confirmation.

Solutions like the Lightning Network are being developed to address these issues and enable more efficient transactions.

Risks and Precautions with Cryptocurrencies

Cryptocurrencies offer compelling benefits but also carry significant risks. Beware of any promise of "guaranteed profits."

This section outlines what to watch for when using or investing in cryptocurrencies. Understanding the risks is key to safer participation.

Price Volatility

Cryptocurrency prices are extremely volatile, with sharp rises and falls even in short periods. This high volatility is a defining feature.

Key factors include:

• Small market size—large trades can move prices significantly
• Quick reactions to regulatory or technical news
• Speculative behavior and market psychology
• Round-the-clock trading producing continuous price changes

It’s not unusual for a cryptocurrency’s value to rise or fall by 30% or more in a single day—swings rarely seen in stock markets.

Invest only what you can afford to lose. Never invest funds needed for living expenses or emergencies. Stick to surplus funds and amounts you can lose without impacting your livelihood.

Security Risks (Hacking, etc.)

Cryptocurrencies are secure by design, but exchanges and wallets are targets for hackers. Several major hacks have resulted in significant asset losses.

Main threats include:

• Exchange hacks and asset theft
• Phishing scams stealing account data
• Malware targeting wallet private keys
• Password leaks or poor password management

Your "private key" is the key to your crypto—if lost, you lose access to your assets. If stolen, someone else can spend your crypto.

Protect yourself by:

• Enabling two-factor authentication
• Using strong passwords and updating them regularly
• Storing large assets in hardware (offline) wallets
• Avoiding long-term storage of large assets on exchanges
• Never clicking suspicious emails or links

Regulatory Changes

Crypto regulations are inconsistent worldwide and subject to frequent change. Some countries have banned crypto outright.

Examples include:

• China’s 2021 ban on crypto mining
• Japan’s 2020 Payment Services Act amendments
• Tax law changes across jurisdictions
• Tighter regulation of exchanges

Such changes can dramatically affect prices and market access. For example, a government ban often triggers mass selloffs and price crashes.

Tax rules are crucial. In Japan, crypto profits are taxed as miscellaneous income at rates up to about 55%. Failing to understand or comply can lead to unexpected tax bills.

Fraud and Scams

As crypto has grown, so have scams and fraudulent investment pitches, especially on social media and dating platforms.

Common scams include:

• Exaggerated claims of "guaranteed profits" or "surefire gains"
• Ponzi schemes paying early investors with new investor money
• Fraudulent invitations to invest in non-existent cryptocurrencies
• Repeated requests for extra withdrawal fees
• Impersonation of celebrities to solicit investments

If someone you meet online offers an easy way to get rich, be skeptical—even if they claim personal success. Always confirm the legitimacy of the opportunity.

To protect yourself:

• Be wary of words like "guaranteed," "certain," or "absolute"
• Question any offer promising unusually high returns
• Ignore solicitations from unregistered operators
• Don’t rush decisions under pressure
• If in doubt, consult financial regulators or consumer protection agencies

Remember: no investment is risk-free. Avoid unlicensed operators and too-good-to-be-true promises.

Cryptocurrency Regulation and Future Outlook

How are cryptocurrencies regulated globally, and where is the industry headed? Here’s an overview of regulations in Japan and abroad, and a look at emerging opportunities.

Crypto technology is expanding far beyond money, impacting digital art, music, gaming, and even social infrastructure.

Japan’s Regulatory Landscape

Japan is a global leader in crypto regulation. The 2017 Payment Services Act established mandatory registration for exchanges. Subsequent 2020 reforms renamed "virtual currency" to "crypto asset" and tightened management of customer funds for greater user protection.

Key regulations include:

• Mandatory registration of crypto exchanges with the FSA
• Anti-money laundering (AML) and identity verification
• Requirement to store customer assets in cold wallets
• Taxation of crypto gains as miscellaneous income
• Advertising and solicitation standards

Further legal reforms are underway, seeking to bring crypto assets under the Financial Instruments and Exchange Act as a separate asset class, balancing investor protection with innovation.

Global Approaches

Approaches to crypto vary by country, and there’s no unified global standard yet.

• United States: The SEC and CFTC oversee different aspects, with crypto ETFs now attracting institutional investors. Regulation varies by state, making the landscape complex.

• European Union: The MiCA framework is creating unified rules for crypto services across member states.

• China: All crypto trading and mining are banned, but the government is pushing its own digital currency (CBDC).

• El Salvador: First nation to adopt Bitcoin as legal tender, rolling out the "Chivo" wallet to promote financial inclusion, though the move remains controversial.

• Singapore: Maintains clear, pro-crypto regulations, attracting a concentration of crypto companies.

Each jurisdiction sets priorities—including consumer protection, financial stability, and innovation—resulting in diverse regulatory models.

Web3, DeFi, and the Next Wave

Crypto technology is moving beyond payments and investment to power the next wave of the digital economy.

• Web3: Envisions a decentralized internet where users control their data and participate directly in online services, moving away from centralized platforms.

• DeFi (Decentralized Finance): Delivers financial services—lending, trading, insurance—without banks, using smart contracts for automation and universal access.

• NFTs (Non-Fungible Tokens): Certify digital ownership of art, music, and in-game items, enabling new revenue streams for creators and bringing the concept of "originals" to digital content.

• DAOs (Decentralized Autonomous Organizations): Operate without central managers, using token-based voting for governance—an experimental new model for organizations.

These innovations promise to reshape multiple industries—not just finance, but entertainment, education, healthcare, and real estate as well.

Challenges remain, including technical complexity, regulatory uncertainty, and security risks. As technology and regulation mature, more practical applications are expected to emerge.

Summary

Cryptocurrencies are a new asset class, constantly evolving with technological progress. Their disruptive potential could transform traditional finance, but they come with unique risks.

This article covered the definition of cryptocurrencies, blockchain fundamentals, major crypto types, advantages and risks, regulation, and future prospects.

Always act with full understanding of the risks and mechanisms involved, and take personal responsibility in all decisions. Don’t fall for promises of guaranteed profits—rely on your own research and make careful judgments.

Crypto isn’t just for investment—its underlying technologies are driving new services across Web3, DeFi, NFTs, and beyond. The pace of development is rapid, so staying informed is critical.

Continuous learning from trusted sources and building your own understanding is the best way to navigate the ever-changing world of crypto safely and effectively.

FAQ

What Are Crypto Assets (Cryptocurrencies), and How Are They Different from Traditional Currency?

Crypto assets are electronic money built on blockchain technology. Unlike traditional currency, they operate transparently and securely on decentralized networks without central bank oversight.

How Is the Value of Crypto Assets Determined, and How Secure Are They?

Crypto asset values are set by supply and demand, adoption, and technological innovation. Security is rooted in cryptographic blockchain design, but users must practice vigilant wallet and platform security.

How Do I Buy and Store Crypto Assets? What’s the Best Way for Beginners to Start?

Open an account with a crypto exchange, deposit funds, and trade to purchase crypto assets. Beginners should start small. For security, use hardware or hot wallets and rigorously protect your private keys.

What Are the Differences Between Major Crypto Assets Like Bitcoin and Ethereum?

Bitcoin functions as currency, uses Proof of Work, and has a fixed supply of 21 million coins. Ethereum is a platform for smart contracts and DApps, uses Proof of Stake, and has no supply limit. Bitcoin’s blocks are generated about every 10 minutes, while Ethereum’s are processed in about 15 seconds for faster transactions.

What Are the Risks and Tax Considerations of Crypto Asset Investments?

Crypto asset gains are taxed as miscellaneous income, with rates up to about 55%. Failing to declare gains can result in tax evasion penalties. Set aside funds for taxes, keep accurate records, and file returns properly. International agreements make concealing crypto income increasingly difficult.