Is there a good reason for this other than if you're about to buy a house or something? Most of my net worth is in investments; very little is in checking or savings, because it doesn't seem like there is any benefit to that.
I guess I'll note, I've never had that much in my personal account but I have a friend who did for a while (and a family member who also did). Personally, I canceled my chase account because a teller at the local branch was being a condescending dick to me. I assume because I didn't have that much money in my account lmao.
Liquidity. FDIC insurance upto $250k. Of course, you don't want to put a big chunk of your money into a bank like this, but $100k is not a "big chunk of your money" to a lot of people, in relative terms.
I'm assuming your sentiment applies to HYSAs as well, which is the better place for this kind of thing.