@angrysoba
I don't really believe that IQ is a measure of much in the real world, but let's not go down that rabbit hole this time. Certainly doesn't stop anyone from doing stupid stuff or having stupid beliefs.
As for Tesla and SpaceX, I don't see how owning something would prove someone isn't stupid. Contrary to his claims, he didn't start Tesla, nor PayPal for example. He bought Tesla, just like he bought Twitter, while in the case of PayPal actually PayPal bought his crappy X.com competitor... and was promptly dismayed at his unusable spaghetti code. And he didn't design any of the space stuff at SpaceX.
And that's ignoring the stuff he's hyped and failed, like SolarCity. Or half-baked and abandoned ideas like the hyperloop.
What he's done in all cases is hype it with some unrealistic claims and promises, and occasionally outright lies. E.g., in his SolarCity big presentation, where he claimed that all those houses had his solar roof tiles, which not only wasn't the case, they didn't even EXIST yet. He had some tiles glazed to LOOK kinda like solar panels, but they weren't.
Or on the subject of Tesla, promises like that he'll soon produce 20 million electric cars a year... which would need about as much lithium per year as was mined in the previous decade, not to mention running into the problem of the known world-wide lithium reserves. He dismissed that as his being able to just extract lithium from clay with salt and water, but again that process didn't even exist, so he was just lying on the stage.
Plus other promises that pumped the price up, like the Tesla Roadster, Cybertruck, etc, which never seemed to actually get done. Nor match his initial promises, even in their current vapourware state. (E.g., the cybertruck went from a monocoque hydroformed one-piece body to attaching sheet metal to a conventional chassis, defeating one major point of why that body would be better.)
Plus other vapourware claims like the ability to deliver full self-driving any time now, for several years.
Etc.
And in all that, the only constant seems to be self-aggrandizing himself for attention. (I.e., what I called a Tinkerbellend.) Again, occasionally with outright lies.
So basically, not much different than what he's done with Twitter.
So... why does that prove he's not an idiot?