BITCOIN

https://source-wiki.win/index.php?title=The_Biggest_Trends_in_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN_We've_Seen_This_Year

Bitcoin is an electronic currency which runs without any type of main control or the oversight of financial institutions or federal governments. Rather it relies on peer-to-peer software as well as cryptography.