2. Khun Sa: $5 billion
Who would’ve thought that the leader of the Shan United Army, who trained hundreds of his soldiers during the Chinese Civil War, would trade it in so that he can become another criminal in the drug business? Khun Sa’s situation was a little different since he already had a substantial income — not to forget that he was leading an army of people; giving them the instructions and orders. Eventually though, Khun had a helping hand in selling the increasingly popular heroin substance in the streets of New York during the 1970s and all the way up to the ‘90s. He had made $5 billion by then.