I guess Martin Eberhard and Marc Tarpenning were just hapless chaps stumbling around in the dark, until Elon lighted their way with his genius vision of how to build an EV. /s
So much so I had to google their names because even I can't remember them.
If his wealth were a US treasury bond, he'd have to spend at least $50,000,000 every DAY in order to not still keep getting richer.
Take a moment to think about how difficult it is to spend $50,000,000. If I gave you 24 hours to do it using Brewster's Millions rules, you'd struggle.
There is no good reason for billionaires to exist.