If prices are getting very high, Satoshi would not really need hundreds of billions of Dollars, it makes more sense if he is voluntarialy organizing a serious "giveaway" and distributed it to non-profitable organizations working agains climate-change, to red-cross, fund educational programs, etc...
He would remain very, very rich, would make Bitcoin safer and definitely write his name in history.
That's what's Bill Gates is doing, Gates has reduced his stock
holding hodling on pre schedule share sell off, and transferring his wealth to Bill and Melinda Gates Foundation.