Agree. It would only serve its purpose for newcomers into crypto, as they're not used to properly securing their funds against hacks or theft. For experienced crypto users, this is highly unnecessary. After all, crypto allows people to be their own bank. I'm sure that if a "Bank of Crypto" becomes a reality in the future, many people will solicit its services in mass. But I believe that the new crypto-centric financial institution would have to face a lot of regulatory hurdles in order to provide its services worldwide.
Despite this, there's a lot of applications within the world of "De-Fi" (Decentralized Finance) which work just like an ordinary bank. For example, we got "Compound.Finance" and "MakerDAO" which allow users to either lend or earn interest from their funds. But of course, these dApps are not suitable for non tech-savvy people. Which is why, sometimes a centralized solution (like the aforementioned "Bank of Crypto") is best in order to bring ease-of-use for people in the mainstream world.
Nonetheless, time will tell us what will be the outcome of a Bank which accepts crypto for deposits/withdrawals. As Blockchain technology becomes adopted by governments more thoroughly, new business ventures could emerge in the not-so-distant future. No matter if a "Bank of Crypto" is launched or not, at least Bitcoin has fulfilled its purpose of transforming our economy for the better. Just my opinion