What is fiat?

What do the banknote in your pocket and the euros you see in your online banking have in common? Both are fiat, even though you can hold one and the other only shows up as a balance on a screen.

Think about your salary: it’s paid in euros, you use them to pay at the supermarket, and your taxes are calculated in the same currency. That broad acceptance, together with the legal framework and trust in institutions, underpins its use. There’s no promise that you can hand over each euro and get a specific amount of gold in return.

Central banks influence the quantity and cost of money through monetary policy, while commercial banks create deposits when they make loans. So fiat doesn’t just mean cash, nor is all money created by printing banknotes.

Why it matters

On exchanges, you’ll come across options like “fiat deposit” or “fiat withdrawal.” For someone in Greece, that usually means moving euros from or to a bank account. In a BTC/EUR trading pair, the price shows how many euros one bitcoin is worth.

The distinction we keep in mind is that digital money isn’t necessarily cryptocurrency. The euros in your bank remain fiat. Likewise, a stablecoin that aims to track the dollar is a different asset from the dollars in a bank account.

What to watch out for

Just because a currency is used every day doesn’t mean it keeps a stable purchasing power. With inflation, the same amount buys fewer goods and services. Exchange rates between currencies, such as the euro and the dollar, also change.

When converting between crypto and fiat, check the platform’s fees, exchange rate and withdrawal terms. A euro balance shown by an exchange shouldn’t automatically be treated as a bank deposit with the same guarantees. Its protection depends on the provider and on how the funds are held.