Edit: I mean a bank that doesn't do anything with your money e.g. putting out loan or buying bond with it. Therefore, your money would be theoretically safe.
https://marshallsociety.com/thoughts/uncategorized/japans-ne...
https://www.morganstanley.com/ideas/bank-of-japan-takes-inte...
I lived in the US for a couple of years and had an account with Wells Fargo. They charged $15 / month (!) but waived the fee if the customer keeps a balance of a few thousand dollars, or gets a regular paycheck. So I never paid the fee.
Now living in Finland, my bank theoretically charges something like 3 EUR / month but I still don’t pay it because it’s offset by customer bonuses I get from having my mortgage with this bank.
So really these monthly fees are a way of weeding out inactive customers.
By the way, the negative asset logic is one reason is why Warren Buffet hates Bitcoin.
They do not take rate fees because that being "against the believes", but also, they do not pay interest rates.
I've read something about that a while ago and thought "ok, but how do they earn money". It was not clear for me, how they do that. And, yeah, it wasn't of any importance for me.