What Is Cryptocurrency?

Cryptocurrency is digital money that exists only online and moves directly between people over a network of computers, with no bank or government in the middle.

The "crypto" part comes from cryptography, the math-based coding that secures every transaction and makes it extremely hard to fake or copy a coin.

Bitcoin, launched in 2009, was the first cryptocurrency, and thousands more have followed, including Ethereum, Solana, and Dogecoin.

Unlike the dollars in your checking account, these coins aren't issued or backed by any government, so their price is set entirely by what buyers are willing to pay.

When you send a friend $50 through your bank, the bank checks your balance, moves the money, and updates its own private records.

With cryptocurrency, thousands of computers hold identical copies of the transaction history and check each payment together, so no single company is in charge.

How Does Cryptocurrency Work?

Most cryptocurrencies run on a blockchain, a shared digital ledger, or record book, that lists every transaction ever made with that coin.

New transactions are bundled into groups called blocks, and each block is linked in order to the one before it, forming a chain.

To change an old entry, someone would have to rewrite that block and every block after it on most of the network's computers at once, which is why the record is so hard to tamper with.

Say you want to send $100 worth of bitcoin to a cousin overseas.

You open your crypto wallet, the app that stores your coins, enter your cousin's wallet address, which works like an account number, and hit send.

The network confirms the coins are yours, records the payment in the next block, and your cousin usually sees it arrive within minutes to an hour.

You pay a small network fee, but no bank has to approve the transfer, and it works the same on a Sunday night as on a Tuesday morning.

On Bitcoin, miners keep the ledger honest: these are computers that compete to solve a complex math puzzle, and the winner adds the next block and earns newly created bitcoin as a reward.

Ethereum uses a different system called proof of stake, where participants lock up their own coins as a security deposit they forfeit if they cheat.

Bitcoin's code also caps its total supply at 21 million coins, a built-in scarcity that leads some supporters to call it digital gold.

The Main Types of Cryptocurrency

Bitcoin

Bitcoin is the original and largest cryptocurrency, built as digital money with a fixed supply.

Most people today hold it as a long-term investment rather than spending it on everyday purchases.

Ethereum

Ethereum is a blockchain that runs smart contracts, programs that carry out an agreement automatically once its conditions are met, and its coin, ether, pays the fees to use the network.

Thousands of other crypto apps and tokens are built on top of it.

Stablecoins

A stablecoin is designed to hold a steady value, usually $1, by keeping reserves such as cash and short-term U.S. Treasury bills, and the GENIUS Act, signed in July 2025, created the first federal rules for the companies that issue them.

That steadiness makes stablecoins useful for moving money, though a stablecoin is only as reliable as the reserves behind it.

Altcoins and Meme Coins

"Altcoin" is a catchall term for any cryptocurrency other than Bitcoin, ranging from established networks like Solana to meme coins like Dogecoin that started as internet jokes.

Many smaller coins have little use beyond speculation and can lose most of their value in days.

Why Do People Buy Cryptocurrency?

The biggest draw is growth potential: Bitcoin traded for fractions of a cent in 2010 and topped $100,000 for the first time in December 2024.

Crypto also lets you send money anywhere in the world at any hour without waiting on a bank wire, which matters to people supporting family abroad.

For you, the practical question is whether a small position fits your goals, since crypto can grow far faster than a savings account or shrink just as quickly.

A common claim is that Bitcoin protects you from inflation, the steady rise in prices that shrinks what each dollar buys.

The fixed supply makes that idea appealing, but the record so far does not back it up: in 2022, when U.S. inflation hit its highest level in about 40 years, Bitcoin lost more than half its value.

Over short and medium stretches, crypto has tended to behave like a high-risk tech stock, rising when investors feel confident and falling when they get nervous.

How Risky Is Cryptocurrency?

Crypto is one of the most volatile assets you can buy, meaning its price can swing sharply in a short time.

Bitcoin hit a record of about $126,000 in October 2025, then fell to roughly $60,000 by early February 2026, a drop of more than 50% in four months.

If you had put $1,000 into Bitcoin at that peak, your stake would have been worth less than $500 by February.

Prices had climbed back into the $80,000s by late September 2026, but anyone forced to sell during the slump locked in a painful loss.

Crypto is also a favorite tool of scammers, because payments are fast and usually can't be reversed.

Americans reported more than $11 billion in crypto-related fraud losses in 2025, according to the FBI's 2025 Internet Crime Report, and anyone promising guaranteed returns is a red flag.

The rules are still unsettled, too.

On Sept. 15, 2026, the Senate fell short in a 49-50 procedural vote on the CLARITY Act, a bill meant to spell out which federal agencies oversee which cryptocurrencies, leaving that question open heading into the November elections.

So how do you avoid losing everything?

The most reliable protection is sizing: invest only money you could watch fall by half without changing your plans for rent, emergencies, or retirement.

Many investors keep crypto to a small slice of their savings, and if you're unsure where that line sits next to your emergency fund and retirement accounts, a fee-only financial planner can help you set a limit before you buy.

Is Crypto Insured Like a Bank Account?

No, and this is one of the most common and costly misunderstandings.

The FDIC protects bank deposits up to $250,000 if a bank fails, but FDIC deposit insurance does not cover crypto assets, even when the crypto company holding them works with an insured bank.

If an exchange collapses or is hacked, there is no federal guarantee that you'll get your coins back.

Customers of FTX, once one of the largest exchanges, waited more than two years for repayments to begin after it collapsed in November 2022.

The same is true if you hold your own coins and lose your private key, the secret code that proves you own them: there is no password reset.

How Are Cryptocurrencies Taxed?

The IRS treats cryptocurrency as property, not currency, so it is taxed much like stock.

You can owe tax on a gain when you sell crypto for dollars, trade one coin for another, or use it to buy something.

For example, if you buy $1,000 of ether, it grows to $1,400, and you trade it for Solana, you owe tax on a $400 gain even though you never cashed out to dollars.

Starting with sales made in 2025, U.S. crypto exchanges and other brokers report your transactions to the IRS on Form 1099-DA, so the IRS sees much of the same information you do.

How Do You Buy Cryptocurrency?

You don't need to buy a whole coin: if Bitcoin trades at $80,000, a $100 purchase gets you 0.00125 bitcoin, and its value rises or falls in proportion.

Crypto Exchanges

A crypto exchange is an app or website where you link a bank account and buy coins directly, often starting with just a few dollars.

For a simple first step, Gemini lets you buy and sell Bitcoin, Ethereum, and other major coins from a phone app, and it holds the coins for you so you don't have to manage your own keys.

Brokerage Accounts and ETFs

Since January 2024, spot Bitcoin exchange-traded funds, or ETFs, which hold actual Bitcoin and trade like a stock, have let you invest through a regular investing account or an individual retirement account (IRA).

You skip managing keys, but you pay a small annual fee and can't spend or transfer the underlying coins.

Self-Custody Wallets

A self-custody wallet, often a small hardware device, puts your private key in your hands alone, so an exchange failure can't touch your coins.

The tradeoff is full responsibility: lose the 12- or 24-word recovery phrase the wallet gives you, and no company can restore your coins, which is why many owners write it on paper and lock it away offline.