Before you go on, I'm not trying to promote Sergey Mavrodi, or the schemes he creates, I'm posting this to help more people get informed.
Long story short, this man has created some of the most monumental pyramid schemes in history. His current scheme, MMMglobal is using bitcoin and people form all around the world are using it.
Watch this video from 2007 to see who he is, and what he has done.
https://www.youtube.com/watch?v=WKG0Rlv6uIE