I wold suggest, just quietly, the he does, in some fashion, have a stake in what's going on.
He is an investor that has made billions. This is a new, exciting market that stands to make him more billions. But it's not the money, it's the excitement that this is all new, that will attract people like him.
He won't bet his house on it, but he will play. It is too juicy for him not to.