τι ειναι το bitcoin και πως λειτουργει

http://aleksandrovy.ru/index.php/20_Reasons_You_Need_to_Stop_Stressing_About_Εξαργυρωση_bitcoin_σε_ευρω

Bitcoin is a digital currency which operates without any type of main control or the oversight of banks or federal governments. Rather it counts on peer-to-peer software as well as cryptography.