bitcoin για αρχάριους
https://meet-wiki.win/index.php?title=10_Pinterest_Accounts_to_Follow_About_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN
Bitcoin is an electronic money which operates devoid of any kind of central control or the oversight of banks or federal governments. Rather it relies upon peer-to-peer software program as well as cryptography.