#5. Mark Zuckerberg
Is the happy founder of the world wide social network company, Facebook which he launched from his Harvard dorm room in 2004. When he noticed the huge need for friends to stay in touch no matter what part of the world they were in, Facebook now has an average of 1.71 billion monthly active users. The 12-year-old social network company still continues to grow thanks to its faithful users and all their friends, Mr. Zuckerberg now has a net worth of $55.1 billion.