Wrong question if you actually like capitalism or value keeping it going. The question should be how to make the necessary reforms to capitalism to not have people try to attempt "the other ways" you're going to try to debate. The problem, it seems, is that Capitalists can't fathom a world where they might be prevented from doing maximum extraction.
I know what I'd be using those billions for!! To virtue signal like hell that I was the most nature conservationist billionaire in existence. Not "how can I say this is conservation and monetize it", real conservation with true stewardship of the land. But also that thinking is probably why I'm not a billionaire.
Like what does "work" constitute?