τι ειναι το bitcoin και πως λειτουργει

http://spencertbpo533.yousher.com/3-reasons-your-ta-panta-gia-to-bitcoin-is-broken-and-how-to-fix-it

Bitcoin is an electronic money which runs without any type of central control or the oversight of financial institutions or federal governments. Instead it relies on peer-to-peer software application as well as