τι ειναι το bitcoin και πως λειτουργει

https://dantepxky023.bravesites.com/entries/general/How-to-Solve-Issues-With-Bitcoin-%CE%B1%CF%80%CE%B1%CF%84%CE%B7

Bitcoin is a digital money which runs free of any kind of central control or the oversight of banks or governments. Instead it relies on peer-to-peer software and cryptography.