Cryptocurrency exchanges are the main way to buy crypto, but they differ in fees, security, and what coins they offer

If you want to buy cryptocurrency, you'll use a cryptocurrency exchange — a platform where you can trade regular money for digital coins. The largest exchanges in the United States are Coinbase, Kraken, Gemini, and Crypto.com. Each one charges different fees, holds different coins, and has different security practices. You'll need to create an account, verify your identity, and link a bank account or debit card before you can buy anything.

The exchange you choose matters because fees add up quickly. Some charge a percentage of each trade (often 0.5% to 2%), while others charge a flat dollar amount per transaction. If you're buying small amounts regularly, a $2 flat fee might be better than a 1% percentage fee. If you're buying large amounts, the opposite is true. You should compare the fee structure of at least two exchanges before opening an account.

Security is the other major difference. Exchanges vary in how they store your coins and what happens if the exchange itself gets hacked. Some keep most customer coins in offline storage (called "cold storage"), which is safer. Others keep more coins online and accessible, which is faster but riskier. Read the exchange's security page before you deposit money.

Key Takeaways

  • Cryptocurrency exchanges like Coinbase and Kraken are where you buy crypto with regular money, but they charge different fees and offer different coins.
  • Compare fee structures across at least two exchanges, because a 1% trading fee on a $1,000 purchase costs $10, while a $2 flat fee costs $2.
  • Exchanges differ in how they store your coins and protect them from theft, so check their security practices before depositing money.
  • Self-custody wallets let you hold coins yourself instead of on an exchange, but you become responsible for not losing your password or recovery phrase.
  • As a homeowner, crypto holdings can affect your net worth for refinancing or home equity decisions, so track what you own and its value.

How to set up an account on a major exchange

Most exchanges follow the same basic steps. You create an account with an email address and password, then verify your identity by uploading a photo ID and sometimes a selfie. This process is called Know Your Customer (KYC) verification and is required by law in the United States. It usually takes a few minutes to a few hours.

After verification, you link a bank account or debit card. Linking a bank account is slower (3 to 5 business days for transfers) but usually has lower fees. Debit cards are instant but often charge higher fees per transaction. Once your payment method is linked, you can buy crypto immediately.

Write down your account password and save it somewhere secure — not in a note on your phone. Many exchanges offer two-factor authentication (2FA), which adds a second security step when you log in. Turn this on. If someone gets your password, 2FA prevents them from accessing your account without also having your phone or authentication app.

Exchange-based storage versus self-custody wallets

When you buy crypto on an exchange and leave it there, the exchange holds it for you. This is called custodial storage. It's convenient — you can sell quickly if you want to — but you're trusting the exchange to keep your coins safe. If the exchange gets hacked or goes out of business, your coins could be lost. Most major U.S. exchanges carry insurance on customer holdings, but the coverage limits vary and may not cover all scenarios.

A self-custody wallet is software or hardware that lets you hold your own coins without using an exchange. You download a wallet app (like Ledger, Trezor, or MetaMask) or buy a hardware device, and the wallet generates a private key — a long string of characters that only you know. Anyone with your private key can move your coins, so you must keep it secret and write it down in a safe place.

Self-custody is more secure against exchange hacks, but riskier in other ways. If you lose your private key or recovery phrase, you lose access to your coins forever. There's no customer service to call. If you send coins to the wrong address by mistake, they're gone. Self-custody is better for people holding crypto long-term who don't plan to trade often. Exchange storage is better for people who trade regularly or aren't comfortable managing their own security.

Fees and costs across different platforms

Exchange fees fall into a few categories. Trading fees are charged when you buy or sell. Deposit fees are charged when you move money into the exchange (rare on major U.S. exchanges). Withdrawal fees are charged when you move money or crypto out. Inactivity fees are charged if you don't use your account for a long time (uncommon but worth checking).

Coinbase charges around 0.5% to 2% per trade depending on your account type and payment method. Kraken charges 0.16% to 0.26% per trade for most users. Gemini charges 0.5% to 1.5%. Crypto.com charges 0.04% to 0.4%. These rates change and vary based on your account history and the coin you're buying, so check the exchange's fee page before you trade. Some exchanges offer lower fees if you hold their own token or if you trade larger amounts.

If you use a self-custody wallet, you don't pay the exchange fees, but you do pay network fees (called "gas fees") when you move coins. These fees go to the blockchain network, not the wallet company, and they vary based on how busy the network is. Bitcoin network fees might be $1 to $10 per transaction. Ethereum network fees can be $5 to $50 or more during busy times. These fees are separate from any exchange fees.

Crypto holdings and your home finances

If you own a significant amount of cryptocurrency, it affects your financial picture as a homeowner. When you refinance a mortgage or apply for a home equity line of credit, lenders look at your net worth and assets. Crypto holdings count as assets. Some lenders ask you to list them on your application. Others may ask for proof of ownership or recent account statements.

Crypto is volatile, meaning its value swings up and down quickly. If you're planning to refinance or take out a home equity loan soon, a sudden drop in crypto value could affect how much you can borrow. On the other hand, a gain in crypto value increases your net worth and may help your application. Keep records of what you own and when you bought it, because you'll need this for taxes anyway.

If you sell crypto at a profit, you owe capital gains tax on the difference between what you paid and what you sold it for. This is true even if you reinvest the money in more crypto. Track your trades carefully and report them to the IRS on your tax return. Failing to report crypto sales can result in penalties and interest.

Red flags and common mistakes to avoid

Never send money to an exchange before verifying the website address. Scammers create fake exchange websites that look almost identical to real ones. Always type the exchange name directly into your browser or use a bookmark. Don't click links in emails or texts claiming to be from an exchange.

Don't store large amounts of crypto on an exchange you don't recognize or that has a poor reputation. Stick to exchanges that have been operating for several years and have clear security policies. Read recent reviews, but remember that unhappy customers are more likely to leave reviews than satisfied ones.

Don't share your private key, recovery phrase, or password with anyone — not even customer service. Real exchanges will never ask for these. If someone claiming to be from an exchange asks for your private key, it's a scam.

Don't invest money you can't afford to lose. Crypto is highly speculative. People have lost their entire investment. As a homeowner, your priority should be your mortgage, property maintenance, and emergency savings. Crypto should only be money left over after those are covered.

Frequently Asked Questions

Do I need to use the same exchange to buy and sell crypto?

No. You can buy on one exchange and sell on another. However, moving crypto between exchanges takes time (usually 10 minutes to an hour) and costs network fees. Most people buy and sell on the same exchange for convenience. If you use a self-custody wallet, you can send crypto to any exchange that accepts it and sell there.

What's the difference between a hot wallet and a cold wallet?

A hot wallet is connected to the internet and lets you access your crypto quickly. A cold wallet is offline (like a hardware device or paper wallet) and is more secure but slower to use. Exchanges use both — they keep most customer coins in cold storage and some in hot wallets for fast withdrawals. For personal use, cold wallets are better for long-term holding, hot wallets for regular trading.

Can I buy crypto with a credit card?

Most major exchanges accept credit cards, but they charge higher fees than bank transfers — often 3% to 5% per transaction. Credit card companies may also treat crypto purchases as cash advances, which come with additional fees and interest. Using a debit card or bank transfer is usually cheaper.

What happens to my crypto if an exchange goes bankrupt?

If an exchange goes bankrupt, your coins may be lost unless the exchange carried insurance. Coinbase and Kraken insure customer holdings up to certain limits, but coverage varies. Self-custody wallets are not affected by exchange bankruptcy because you hold the coins yourself. This is one reason some people prefer self-custody for large holdings.

Do I have to report my crypto to the IRS?

Yes. Any sale of crypto for a profit is taxable. You owe capital gains tax on the difference between your purchase price and sale price. You also owe tax if you trade one crypto for another, even if you don't convert to dollars. Keep records of every trade and report them on your tax return. Exchanges send you a 1099 form if you meet certain thresholds.