Privacy, taxes, and regulation

Pseudonymous, not anonymous

This is one of the most misunderstood aspects of crypto. Blockchain transactions are not anonymous — they are pseudonymous.

What does that mean? Every transaction you make is permanently recorded on a public blockchain. Anyone can see it. Your wallet address acts as a pseudonym — like a username that isn't obviously linked to your real name. But once someone connects your address to your identity (and there are many ways this can happen), your entire transaction history becomes visible.

How your address gets linked to you

• Buying crypto on an exchange — When you sign up for Coinbase, Binance, or any regulated exchange, you verify your identity (KYC). The exchange knows which addresses you withdraw to.
• On-ramp/off-ramp services — Converting crypto to euros, dollars, or any fiat currency creates a link between your bank account and your wallet.
• Public mentions — Sharing your address on social media, in a forum, or for receiving donations permanently connects it to your public identity.
• Transaction analysis — Companies specialize in analyzing blockchain transactions to cluster addresses and identify owners. Law enforcement agencies use these tools routinely.
• IP addresses — When you interact with blockchain networks, your IP address can be recorded by the nodes that process your transaction.

Every transaction is permanent and public

Unlike bank records, which are private between you and your bank, blockchain transactions are visible to everyone, forever. There is no deleting, editing, or hiding them.

Anyone can enter your wallet address into a blockchain explorer (like Etherscan for Ethereum) and see:

• Every token you've ever sent or received
• Every service you've ever interacted with
• Every deposit, withdrawal, and swap
• Your current balance and all your positions
• The exact time and amount of every transaction

This transparency is a feature, not a bug — it allows anyone to verify that the system works honestly. But it means you should treat your wallet address with the same care you would your bank statements.

Crypto and taxes

Crypto is not tax-free. In almost every country, crypto assets are subject to taxation. The fact that transactions happen on a blockchain rather than through a bank does not exempt you from your tax obligations.

What can be taxed

Tax rules vary by country, but most jurisdictions consider some or all of the following as taxable events:

• Selling crypto for fiat — If you sell ETH for euros or dollars and make a profit, that's typically a capital gain.
• Trading one crypto for another — Swapping ETH for USDC is often treated as selling ETH and buying USDC — the "sale" may generate a taxable gain or loss.
• Earning yield — Interest from lending, staking rewards, and yield farming returns are typically considered income in the year you receive them.
• Receiving airdrops — Free tokens received from protocols or projects may be considered income at the time of receipt.
• Getting paid in crypto — Salary or payment in crypto is income, just like being paid in fiat.
• Purchasing goods or services — Using crypto to buy something may trigger a capital gain if the crypto has appreciated since you acquired it.

Capital gains: short-term vs. long-term

Many countries distinguish between gains on assets held for a short period and those held longer:

• Short-term gains — Assets held for less than a year (in many jurisdictions) are taxed at higher rates, often as regular income.
• Long-term gains — Assets held for more than a year may qualify for reduced tax rates.
• Some countries exempt small gains — Germany, for example, exempts crypto gains if held for more than a year. Portugal had a more favorable regime that has since changed.

Keeping track of when you acquired each asset and at what price is essential for calculating your taxes correctly. This is called cost basis tracking.

DeFi and taxes: added complexity

DeFi makes tax reporting significantly more complex than simple buy-and-hold crypto:

• Lending deposits — Depositing USDC into Aave and receiving aUSDC may or may not be a taxable event, depending on your jurisdiction.
• Liquidity provision — Adding and removing liquidity can involve multiple token swaps, each potentially taxable.
• Yield accrual — Interest and rewards may be taxable when earned, claimed, or sold — the rules differ by country.
• Token wrapping — Converting ETH to wETH, or staking ETH for stETH, may or may not be a taxable exchange.
• Cross-chain transfers — Bridging tokens between networks involves complex technical events that may have tax implications.

Regulation: decentralized doesn't mean unregulated

A common misconception is that because DeFi protocols are decentralized, they exist outside the law. This is not true. While the protocols themselves run on open code, the people who use them are still subject to the laws of their country.

KYC and AML

KYC (Know Your Customer) and AML (Anti-Money Laundering) are regulations that require financial services to verify the identity of their users and monitor for illegal activity.

• Centralized exchanges (Coinbase, Binance, Kraken) are required to perform KYC — they verify your identity before you can trade.
• On-ramps and off-ramps (services that convert between crypto and fiat) also require KYC.
• Most DeFi protocols do not require KYC — you interact directly with smart contracts using your wallet. However, this doesn't mean the activity is unregulated.
• Sanctions compliance — Some jurisdictions prohibit interacting with certain addresses or services. Blockchain analysis companies help enforce this.

The regulatory landscape is evolving

Different jurisdictions are taking different approaches:

• European Union — MiCA (Markets in Crypto-Assets Regulation) establishes a comprehensive framework for crypto service providers, including stablecoin issuers and exchanges.
• United States — Multiple agencies (SEC, CFTC, IRS, FinCEN) have overlapping jurisdiction. Rules are being developed through enforcement actions and proposed legislation.
• United Kingdom — The FCA regulates crypto marketing and exchange registration, with broader rules in development.
• Other countries — Range from crypto-friendly (Switzerland, Singapore) to restrictive or outright bans (China).

Record keeping

Because crypto transactions are permanent and public, you always have a record of your activity. However, organizing that record for tax purposes can be challenging — especially if you use multiple wallets, networks, and DeFi services.

Good practices include:

• Keeping a list of all wallet addresses you control
• Recording when and at what price you acquired each asset
• Tracking deposits and withdrawals from DeFi services
• Noting any yield, rewards, or airdrops received
• Using portfolio tracking tools (like CleanSky) to maintain an overview of your positions

CleanSky doesn't provide tax reports, but having a clear view of your positions and their history across all networks and services is a starting point for any tax preparation.

What CleanSky does and doesn't do

CleanSky helps you see your portfolio clearly — where your money is, what risks are visible, and what services have access to your tokens. We do not:

• Provide tax advice or generate tax reports
• Guarantee the safety of any protocol or position
• Perform KYC or collect personal information
• Store your private keys or access your funds

We believe that seeing your full picture clearly is the first step toward making responsible financial decisions — including tax compliance and risk management.