Look up the cooperative banking movement. Lots of farmer coops have own banks. It all depends on who owns them and what they are used for.

I mean, even if you're against bank's utilizing funds deposited to give out loans, I think they still have an obvious core function.

I'd much rather have a secure facility to keep my money, rather than, like, under my mattress, right? If for no ther reason than it means I'm not broke if my house burns down.

Banks provide a lot of valuable resources. I don't want to be my own bank.

If you don’t like banks or the idea of a for-profit organization handling your money, check out credit unions! They’re non-profit and are generally “owned” by their members vis-á-vis the money in each member’s account, and they’re actually more focused on customer service and care than banks typically are. They’re not FDIC-insured, but they can be NCUA-insured which is literally the same thing but for CUs (read: your money is still safe up to $250k).

Also gonna shoutout Vanguard specifically if you want the same philosophy behind CUs but with an investment firm. They’re still for-profit, but Vanguard is also entirely “owned” by their members - not quite sure how it works like that, but apparently it does.

I too keep all of my money stuffed in my mattress.