Currency is a medium of exchange used to buy and sell goods and services. It simplifies trade by providing an agreed-upon measure of value, eliminating the need to directly barter one good or service for another.
Forms of money have existed for thousands of years, while standardized coins emerged in the ancient world. Currency has since evolved to include paper money, coins and digital forms of money.
Modern currencies are generally issued and managed by governments and central banks. Digital assets such as cryptocurrencies can also function as mediums of exchange, although they operate differently from traditional government-issued currency.
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Last Modified: September 17, 2026