He’s going to be a trillionaire.
Not too shabby for an autistic African-American who talks funny, gives his kids weird names, supports free speech, creates whole industries that succeed wildly at things nobody else can do, and tells the CEOs of huge corporations who want to censor him to "Go. F**k. Yourself."
Even if you can't stand him, he's at least entertaining.
Maybe, but it's a long way from a billion to a trillion. Not sure how old everyone is, but when I was a kid, there were just two billionaires, J. Paul Getty and (kind of remarkably) Howard Hughes. Then, in the 1990s, I remember some posh magazine that had a piece titled something like, "Forget billionaire -- the club now starts at $50 billion".
And seconding, Musk is always entertaining, even when he's shooting off his mouth as he was with his "pedo guy" comment.
Despite his wacko bigotry, Henry Ford was the most significant person in history so far -- he didn't invent industrialism, or even the assembly line (he saw the Armour 'disassembly line' and had a light bulb moment), but he not only metamorphosed manufacturing and brought down prices to broaden adoption, he literally transformed transportation, which led to our taken-for-granted modern road networks (worldwide; I grew up on a washboard gravel road in a home with a gravel driveway). He also mechanized agriculture (the buildout goes on, but that's also worldwide), and Ford was an early aircraft manufacturers.
We're witnessing another transformation -- reusability of spacecraft, electric vehicles (the main reason there's knee-jerk reactions against him), Starlink -- and once Musk's first human colony is on Mars, he'll be the new number one. :^)
Tesla's main contribution was his invention of the three types of AC motors, which altered manufacturing as well as home appliances -- but he was a also a real nutjob. I'd guess that he also had what we used to call Asperger's syndrome (before it was wiped from the DSM). The Margaret Cheney bio of him ("Tesla: Man Out of Time") is great, btw. Tesla also demostrated and patented what we now call radio, eventually winning a pyrrhic court victory over Marconi. He invented fluorescent lighting, using it in his lab (the one that eventually burned down) but considered it not worth patenting. He was one of the prediscovery discoverers of X-Rays (he took an X-Ray of Mark Twain, if memory serves). Despite all that, his bust would have to remain in a niche in the corridor. :^)