I think his view may be limited or short-shighted!
With a crash like this, I don't think making money would be as easy as it was on WS or anywhere else. The future of money may not be on WS, at least not as easy.
For the time being, you may have to pick one as he has said. But do you know which one would make you happier?
That really depends on how well you know today's China and how well you can adapt should you decide to return.