Crypto currency is decentralized in which very highly secured but to be more specific crypto bank is somehow not decentralized though it depends the features that they will provide due to the fact of many users here in crypto currency community as many users want to know in detailed about it. As my own thoughts much better to be secured by our own hardware wallet rather that to be secured by anyone else. Likewise, I don't think it will be supported by many users as well as by those investors here in crypto currency community.
That's certainly true, mate. While Banks are centralized, they serve as an ideal solution for securing one's funds. I believe that a new financial institution that would accept crypto, would attract lots of newcomers in this emerging industry. On the other hand, experienced users will use crypto their own way via hardware wallets or other means. After all, crypto is meant to allow people to be their own bank. We'll have to see if governments are willing to allow Banks to offer crypto services to its customers. Adoption will depend on how governments open up their regulatory stance for Banks to take this wild journey of crypto and Blockchain technology.
Even if we never see a "Bank of Crypto" in the future, we can still depend on many financial services which are completely decentralized. The world of DeFi (Decentralized Finance) is advancing at a fast pace where people can borrow and even lend their money to other users without the need for middlemen. If these services manage to bring ease-of-use, anyone can easily join the world of crypto without any technical knowledge whatsoever.
Nonetheless, time will tell us what will be the outcome of a "Crypto Bank" in the future. There's still regulatory uncertainty, so it may be too early to tell whenever this will be a successful venture in the long run or not. Just my opinion