Musk is the most powerful man in history. Everyone else with the ability to wipe out cities has had some form of government controlling their actions or relied on armies to do the deed, and they couldn't do it anonymously.
Well sure a couple F9's dropped on a city would cause some problems for sure. or maybe you are thinking launching a bunch of titanium rods and dropping them.
Sure he could definitely DO that, but I don't think he could do it anonymously.
Once Starship is up and running, his ability to cause destruction def. goes up, but he would have even less anonymity.
Fans (and I'm sure govts) closely monitor all of SpaceX launches/development/etc. Also, once you got a bunch of rods or rockets or whatever you were going to drop, they don't exactly hide in space, they are pretty easily tracked, and publicly tracked even.
Since they are backlogged with rocket orders, it would cost a LOT to do and lead to to economic decline, if not financial ruin of the SpaceX business.
So could he do it? sure, easily? Not really, but certainly WAY easier than Bezos or anyone else. But anonymously? I really doubt it. Plus who else even has the single handed capabilities? The US Air Force, Russia, India and China. That's pretty much it. Bezos maybe in a few years.
Elon Musk doesn't have the ability to wipe out cities anonymously.
Even if he had the ability to wipe out cities, which he doesn't, by definition being the only private citizen capable of doing so would make the suspect list pretty short.
Musk can.