Fiat currency is money issued by a government in the form of paper banknotes and specie. USD, EUR, GBP, and RUB are fiat currencies supported by CEX.IO.
Fiat currencies are used around the world, so they’re useful for international trade. You can store them in a bank account, use them for transferring funds to another person, or use them to pay for goods and services. On CEX.IO, you can easily trade crypto against fiat currencies using your debit or credit card. Or you can make a bank transfer deposit to trade crypto with fiat currency on your CEX.IO account balance.