τι ειναι το bitcoin και πως λειτουργει

https://victor-wiki.win/index.php?title=10_Pinterest_Accounts_to_Follow_About_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN

Bitcoin is an electronic money which runs devoid of any kind of main control or the oversight of financial institutions or governments. Rather it depends on peer-to-peer software application and cryptography.