Τα παντα για το bitcoin
https://victor-wiki.win/index.php?title=The_Worst_Videos_of_All_Time_About_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN_31689
Bitcoin is a digital money which operates free of any kind of main control or the oversight of banks or federal governments. Instead it relies on peer-to-peer software application and cryptography.