While I am no billionaire, I started in the crypto space with a large debt, huge child support payments, and a 9-5 job. 3 years later my "paper worth" is over $30M, but like all the billionaires above, converting that wealth to cash isn't a trivial task. If Steem takes off then I would probably end up on that list.
RE: The World Billionaires ,The Richest People on Planet 2016