He kinda doesn’t, all his money is loans backed by the value of stocks he owns. Idk the details of how financing works are that scale, but potentially a lot of Tesla’s day-to-day financing probably operates on low interest loans backed by the value of its own stocks, which could create a bad feedback loop if it drops by a certain percent. I imagine there’s gotta be an insurance system for execs of high cap companies so the company doesn’t vanish overnight due to insane fiscal setups like that.