His entire net worth can be accounted for with Softbank's investment of $20m in Alibaba in 1999. That's now worth ~$110B... and he has a 21% stake in softbank.
Remove that.. and he's at 0 or even negative. Is that luck or skill?
I only had the general impression in passing that GGP was his big success that gave him the resources to engage the more recent nonsense. I first heard of him in connection with Valeant more than Herbalife.
It's like, maybe the order in which you have your life experiences is everything.