τι ειναι το bitcoin και πως λειτουργει
https://smart-wiki.win/index.php?title=20_Reasons_You_Need_to_Stop_Stressing_About_Εξαργυρωση_bitcoin_σε_ευρω
Bitcoin is a digital currency which runs devoid of any central control or the oversight of financial institutions or governments. Rather it relies on peer-to-peer software program and also cryptography.