It's just that I've seen over my career some people who seemed irritating or obnoxious, and unlike their usual selves, and this was subtle, and maybe it's their personality anyway, and maybe it's just stress, and maybe this and maybe that...till you discover - surprise! Multiple hypodense areas on the CT! Or something else. Could be as simple as side effects of prescribed medications.
Having seen this, and knowing how the very very rich are surrounded by sycophants, how they refuse to listen to anyone and are allowed to harm themselves, sometimes with the help of others, I hope someone somewhere is forcing Elon to go see a doctor. A real doctor, with old-school diagnostic skills, one who will stand up to him, not someone who will cater to his every whim.
It's quite possible, at the end of the day, that what he's doing is simply him, the end result of various outside events and internal psychological developments. If this is the case, and it is the most likely scenario, then he needs people to stand up to him and say enough is enough.