This is a discussion that happens fairly often, and nobody's ever got any particularly good answers for it.
The answers you'll see most commonly are:
- Howard Lederer is one of the richest people in poker, probably worth many millions (mostly from being an owner of Full Tilt)
- Barry Greenstein is a multi-millionaire, and while he obviously made a big chunk of his money playing poker, the majority of it is in property etc these days
- Mike Matusow spends a lot of time swinging between millionaire and broke
- Phil Gordon is rich, though maybe not as rich as you might think, and he was supposed to be rich before he started playing poker anyway
NFI how accurate any of the above actually is.