Fiat

Key points

• Fiat currency is money issued by a government and declared legal tender, with no backing in gold or another commodity, such as the real, the dollar and the euro.
• Its value rests on trust in the issuing authority and the country's economy, not on a physical asset backing it.
• In the crypto world, fiat is both the starting point and the destination: on-ramp converts fiat into crypto, and off-ramp converts crypto back into fiat.

What is fiat currency?

Fiat is traditional money issued by central banks and declared by law to be valid tender in a country. The term comes from Latin and conveys the idea that the currency has value because an authority has decreed it so, not because it can be exchanged for a fixed amount of precious metal.

How it works

A central bank controls issuance and seeks to manage the amount of currency in circulation to maintain price stability. Since there is no commodity backing, purchasing power depends on monetary policy and the economic health of the issuer. When issuance grows well beyond economic activity, the usual result is inflation, that is, a loss of purchasing power.

Day to day, fiat currency circulates both as paper and, for the most part, digitally, in bank accounts and payment systems such as PIX. This digital form already dominates transactions, even though the underlying record is still kept in the systems of regulated institutions.

Why it matters

Fiat is the value reference of the real economy and the final destination of most payment-oriented crypto operations. A stablecoin like USDC exists precisely to represent a fiat currency, the dollar, within a blockchain. A freelancer who gets paid in crypto abroad measures the result in reais and converts it to fiat via a crypto off-ramp when they need to spend locally.

Risks and limitations

The value of fiat currency depends on trust in the issuer's economic management, and episodes of high inflation erode purchasing power over time. International fiat transfers usually pass through several intermediaries, with higher cost and longer settlement times, a limitation that has driven the use of stablecoins as a faster settlement layer between countries. As a result, part of international flows has migrated to digital rails, where stablecoins pegged to fiat currencies carry the value, while the final conversion into a bank account remains in local currency.