But that's also true for everyone on that list. If they wanted a billion in cash, it wouldn't be a trivial task either. On the other hand, why would you need that much cash to begin with? Even if you wanted a private jet or yacht, you'd be able to finance them and make payments. There's nothing in the world that would require a billion in cash up front.
RE: The World Billionaires ,The Richest People on Planet 2016