I do not know the man well enough to pass any judgement on him. But, your statement [1] raised a question in my mind: On the wiki page, there is an outline of his plan to eliminate global warming through geoengineering. I assume this will cost a lot of money. What if he is trying to build up his wealth so that one day he can fund a massive geoengineering project to help the earth's climate? He has demonstrated the desire at least.

[1] " It's as if he's decided to just make the world a worse place because he can."