Thinking of certain investments in the project where they are planning to arrange a cryptocurrency bank! And I saw discussions about cryptocurrency banks and their "place" in our crypto-future, and, which is even more interesting, noticed that there is quite a number of those who are of the opinion that there is no need for cryptocurrency banks at all. Well, guys, we can discuss that forever, but how do you imagine then the communication with the so-called real world for the sake, e.g., of making deposits or obtaining a loan? How can the whole system function properly without cryprocurrency banks, which are anyway somewhere on the border between the real and crypto worlds?
Crypto-Currency bank already exists, it's called... Bank!
Digital banks deal with local country's currency, but they are digital, you don't need pape money, all the transactions can be done virtually, but you aren't using a decentralized platform, you are using the bank's centralized one. And even you use a "Crypto-Currency bank" it will be centralized anyway, because you will using them as third party service, they will be under control.
I believe there wouldn't be any difference between the currently local centralized bank's system and the Crypto-Currency bank's system you are talking about.