One reason I can think of is that (to the best of my knowledge) you can't deposit cash with Fidelity. I generally like online banks, but for me personally, I r

One reason I can think of is that (to the best of my knowledge) you can't deposit cash with Fidelity. I generally like online banks, but for me personally, I regularly have scenarios where I need to deposit hard cash. And so far, I've found the only way to do that is to have an account with a conventional bank or credit union.