A cryptocurrency (or crypto currency) is a digital asset designed to work as a medium of exchange using cryptography to secure the transactions and to control the creation of additional units of the currency. Cryptocurrencies are a subset of alternative currencies, or specifically of digital currencies.
Bitcoin is a digital currency (also called crypto-currency) ... became the first decentralized cryptocurrency in 2009. Since then, numerous cryptocurrencies have been created These are frequently called altcoins, as a blend of bitcoin alternative. Bitcoin and its derivatives use decentralized control  as opposed to centralized electronic money/centralized banking systems. The decentralized control is related to the use of bitcoins A blockchain—the technology underlying bitcoin and other c... transaction database in the role of a distributed ledger.