(Co-)Founder of PayPal, Tesla Motors & SpaceX.
And of course starting off with Zip2, which he sold for a third of a billion.
He’s most definitely parked in genius territory.
I’d hazard a guess and say recreational ( and perhaps some non-recreational) drug use explains his otherwise erratic behaviour.
However, given the unbelievable mental pressure he puts himself under, it’s not something I’d hold against him.