He’s much better at giving it away when he thinks he is investing. Stuff like shorting Tesla. Hence, some traders have started to follow something called the Inverse Gates Index.
He does, it's literally what the Gates Foundation is for. It isn't easy to just give away $100,000,000,000 and trust that even half of that will get meaningfully spend and that it won't actually wind up getting abused by assholes in powerful positions and making things worse. That's $14 million per day for twenty years.
That's a great strategy if you don't care where it goes. You'd probably be surprised how quickly money can disappear when you have people motivated to spend it.
I think he said that he has equity in OpenAI but he also said that he is not motivated by money but by advancement of the AI and helping the humanity. If he was hardcore motivated by money he would spin off from the OpenAI and pull with him some of the developers and the investors and make his own LLM company.