I used to have a grudging admiration for him, but no more. He always was mentally unstable. When he falls out with Trump (which is inevitable), he's going to get even worse.
His wealth would probably turn into debt if it was all added up. It's all geared on the price of Tesla shares and that's going badly recently. Red Necks buy American cars but they don't buy expensive poncy Telsas. Democrats buy Teslas... or did.
It's known as Conspicuous Conservation. See the Guardian for further details (super dinner party recipes, Page 7) https://en.wikipedia.org/wiki/Conspicuous_conservation