"Elon is currently sitting on 817,000 lifetimes worth of money."

I think that's a wrong perception, especially in this case. Elon Musk does not have nearly a trillion dollar in cash. He holds shares in companies that have a market worth of a trillion dollar. But as soon as he sells, and thus wouldn't be involved with them anymore, they would be only worth a fraction of that. Tesla, in particular, would probably be bankrupt.