A currency is defined as a medium of exchange, meaning it allows parties to transact goods and services by accepting a common standard of value. Crypto comes from Kryptos meaning "to hide." This would mean it is a hidden transaction.
A currency must have four qualities, including: a unit of account, a means of payment, a stable store of value, and act as a single numeraire. To be an asset it must have cashflow or utility that can be used to determine its fundamental value....