How can a cryptocurrency be used as a medium of exchange?

Cryptocurrencies can be used as a medium of exchange by transferring them from one user to another. This involves two users agreeing to buy and sell goods or services, with each user sending and receiving cryptocurrency tokens (often referred to as coins) to complete the transaction. The transfer is instant and secure, while avoiding middleman fees and the need to use traditional banking systems. Cryptocurrencies can also be used to purchase goods and services online, effectively replacing fiat money.