Cryptocurrency is a distributed ledger over a blockchain. The real question is what is a digital money ? Digital money is the digital equivalent to cash. It's

Cryptocurrency is a distributed ledger over a blockchain. The real question is what is a digital money ? Digital money is the digital equivalent to cash. It's money that is emitted by the central bank in digital form that you really own, not a debt that a bank somehow owes you. Cryptocurrency or not, central bank application or other, it's all implementation detail. The important definition is : it's money you can own but that you can't touch.