Right now, digital technologies are developing very quickly, and it’s quite possible that in the near future we’ll already be hearing about the ability to open cryptocurrency accounts in banks. More likely, however, banks will charge fees for this service. I doubt that banks will start offering deposits in bitcoin anytime soon, since it’s still too risky for them. And even if such an option appears, there’s a chance we won’t be able to access those funds as quickly as we’d like, for example, if we want to sell at a favorable rate.
The banking sector have already started diving in little by little, especially those online and digital banking platforms like PayPal, Cash App and other money transmitters which are also under the same banking laws. Later the traditional banking system will join the train, but their fee will always be their major target more than the security of the investors, and we can also see things like detectorship controlling when the owner of the coin can make use of it, when they can withdraw and when they can't, and where they can send to as well.