I'm all for being cynical and jaded, but what do you suppose his secret evil plan is in this case?
So anyway, Sam Altman is working on creating and aligning this super-duper artificial intelligence that, if it works out, makes all of human labour and economic value to date pale in comparison.
You don't get to his level of wealth without having an innate desire for more of money. Everything always comes back to that.
I don't believe for a second that he essentially donated billions of dollars in equity on purpose.