Τα παντα για το bitcoin
https://source-wiki.win/index.php?title=20_Resources_That'll_Make_You_Better_at_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN_13228
Bitcoin is a digital currency which operates without any type of central control or the oversight of financial institutions or governments. Rather it relies upon peer-to-peer software program and cryptography.