15-20M is less than 1% of his wealth. Should view it as toy money rather than serious investment.
Toy money indeed. It may look big to some of us, but that is like some chicken change. It is good that bitcoin is attracting a lot of big investors and that really makes a lot of sense for the future of bitcoin anyway. Yeah, we cannot predict the future just because of that, but the truth is that, these guys would not even blink an eye on their holdings in bitcoin for a very long time knowing that greater opportunities lie ahead.