It occurred to me that Musk might actually be facing an assassination risk, but it'd be from other rich people.

What if other rich people realize that his public implosion where he is revealing himself to be a complete and total idiot, reveals they are also idiots?

We know many other rich people thought he was a genius, and his actions show he is not, which shows they are gullible idiots too.

More people realizing the rich are a bunch of incompetent inheritors of their ancestors luck, and who don't know how to do anything on their own is a threat to their political and economic power.