A cryptocurrency is a digital currency that relies on technology of blockchain and cryptography to secure financial transactions, control the creation of additional units, and verify the assets’ transfer.
Blockchain allows individuals to transact directly with each other even if they do not trust each other. Blockchain is a distributed, decentralized public ledger that is not controlled by a central bank. It also does not require trusted third parties to operate.
Bitcoin, invented by Satoshi Nakamoto, is considered the first decentralized cryptocurrency with the highest market capitalization so far.