Why's this guy being downvoted? There are plenty of capable people out there that can run a given Muskventure. He's got enough money to spitball an idea, spend a good bit of time hiring the right people, choosing a CEO, and letting it ride. The only issue his it seems like his ideas won't make much money - how can you sell Neuralink when the technology doesn't exist to make it feasible?
But give it 15 years and Neuralink is the only product on the market that allows humans to be relevant in the face of A.I.... Smells like the kind of profits one would have if, for example, they dragged an asteroid to Mars and monopolized water, or weaponized Saturn's orbit and controlled the only port for deep space travel, etc. Seems silly now but guaranteed there's gonna be people wealthy on a scale we've never seen when these starts of things come through.
An entrepreneur doesn't have to do the day to day heavy lifting. An entrepreneur hires and works with people who do the heavy lifting.