A cryptocurrency is a peer-to-peer, decentralized, digital currency whose implementation relies on the principles of cryptography to validate the transactions and generation of the currency itself. Top Currencies based on market capitalization Bitcoin – $9.3b Litecoin – $1b Peercoin – $43.3m Quark – $12 million Namecoin Novacoin Primecoin Feathercoin Anoncoin – $0.14m Yacoin Mastercoin Later ...