> Gaining billions more doesn't mean shit. The guy really has nothing to lose and the utility of what he gains contribute little to his life style.

You don’t become a billionaire because you aren’t committed to making a number go up far after you no longer have any significant unmet needs. He’s spending his life focused on business deals because that’s what he cares most about — if his true love was science, philanthropy, etc. he’d have been able to do that full time a couple decades ago.