I would give some money to family and friends, but mostly I’d be doing everything I could to combat climate change, including subsidising/going around government where I had to, and as part of that process help make the world a more equitable place. I’d have a comfortable home, not a palace but just somewhere I could recharge and relax while “off duty” as well as work from if needed.
I’ve been thinking about this topic for months, in reality. This is the only thing I can really imagine doing with such a gargantuan fortune lol.