Given that Elon is Gen X I don't think this something we need to worry about for him just yet. Some other problem, sure, but I doubt it's senility.
Quantitatively no doubt. There is a "pedo guy" incident every few days now and it is accelerating and it could be every few minutes before it gets too fast to measure and reaches some kind of singularity.
I thought he was just trying to imitate Trump but I think he's really trying to surpass Trump as "America's most unhinged."