Well they can do banking, but just inside the state only. You still have to buy lightbulbs and doormats as a business, so you still need a bank to help keep the

Well they can do banking, but just inside the state only. You still have to buy lightbulbs and doormats as a business, so you still need a bank to help keep the money and help deal with normal business stuff. It's just that you can't transfer the money out of the state, as it's considered illegal federally. Unless of course there is some agreement with the other state that says they you can, but that has not happened yet. We do have that kinda thing with some firearms. Utah and Arizona have an agreement that a concealed carry in one state is good in the other one too, so you can just walk across the border and not be in legal hot water. That agreement is not true for all the other neighboring states.