Any form of government-issued money that is used as legal tender by the population and government of a certain nation or region is known as a FIAT currency.

Today, FIAT currencies act as a government-regulated instrument and serve as a store of value, unit of account and medium of exchange. FIAT currencies are backed by the government that issued them, rather than a physical commodity (such as silver or gold).

The vast majority of current paper currencies, such as the US dollar, the Japanese yen, and the Euro, are FIAT currencies.

See: Blockchain, Cryptocurrency.

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