I use 5 different banks and have cash. The problem is that with the lame (primarily US driven) overreaching AML nonsense, banks will not take any risks and close whatever they don't make a lot of money on at the first sign of issues. Why would they not. What do you do if multiple/all banks closed your accounts for no reason at all outside that you are too small a fish to put an actual human on to verify the validity of the closure? Is there anything outside crypto and stuffing money and gold in your mattress?