It would be interesting if there were some way to calculate something like the "cash net worth" of individuals. Work out what they could actually reasonably expect to get if they liquidated all their assets. Obviously it would be a pretty rough estimate, but you'd definitely see some reshuffling of the richest people lists.
Not all sales are equal. Here you have a guy who essentially arrived at the end of the road and brought Microsoft where only Standard Oil arrived before.
Both had extinguished all their natural competitiors and had to be essentially stopped by the US Federal Govt.
Stark contrast with the CEO of a luxury automaker who inflated a financial bubble to enrich himself who is now selling to buy a social media platform.
It could be that confidence in musk and his brand is having more of an impact on share price than supply and demand. He's behaving erratically and is clearly distracted from running tesla by this twitter fiasco. I'm not sure what weighs more on the minds of institutional investors.
I think that's broadly true, though some of the older ones might be able to. Bill Gates, for example, has diversified his wealth out of Microsoft (and he doesn't control the company these days, anyway). I don't think the market would punish Berk or AutoNation, for example, nearly as hard as they've punished Tesla for Elon cutting his ownership stake.