A currency fulfills three well-defined purposes: to serve as a means of exchange, store of value, and unit of account. However, the form of currency itself often has little inherent value. For example, the paper bills in people’s wallets have about as little value as the paper in their printer. Instead, they have the illusion of value, which if shared widely enough by society and endorsed by the government, allows these monetary bills to be used to buy goods and services, to store value for later purchases, and to serve as a metric to price the value of other things.
