τι ειναι το bitcoin και πως λειτουργει

http://www.harrika.fi/wiki/index.php?title=20_Resources_That'll_Make_You_Better_at_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN_63184

Bitcoin is a digital money which runs free of any main control or the oversight of financial institutions or federal governments. Rather it relies on peer-to-peer software as well as cryptography.