He could give away 99.99% of his wealth, still never have to work another day in his life, and be much less of a target if he wanted to. Boo hoo the poor guy who has more money than almost anyone has ever had in the history of the earth has problems
If he gave away 99.99% of his wealth, that would tank the retirement accounts of millions of people, possibly have his life's work be taken over by some hedge fund ("introducing the Tesla Model V8, now with extra vroom-vroom!"), and then get sued by shareholders for the remaining 0.01%.
