Sean Parker founded the file-sharing program called Napster. It allowed users to share and stream digital music files. Sean was a maverick and world-class hacker and had from his teenage years been hacking into organizations and businesses across the world.
He is in part genius, and in part, infamous for his cyber skills. He went on to found Plaxo and Airtime and served on the boards of various large companies, like Spotify and is on the Founder Fund. His net worth is estimated to be at 3.2$ billion.