No, I do not believe that. We must admit that what has allowed banks to acquire so much economic power is their ability to understand where capital is, and make the necessary efforts to keep it.
Knowing that banks will never fight against capital, what I see today is a growing interest of banks to incorporate blockchain technologies into their processes, and because of their marked interest in taking over everyone's money, it would not be strange that in the near future we will see banks willing to accept cryptocurrencies to carry out financial transactions.
Retail banks, investment banks and central banks will need to adapt. They need to follow the market. If retail banking customers want to use cryptocurrency, you can bet that Bank of America will accommodate them with a trusted wallet and transfer system, eventually. I imagine that's why they have something like fifty blockchain patents already.
Likewise, I think investment and central banks won't be able to ignore BTC forever. At some point, they may need BTC in their portfolios as a hedge against the devaluation of other assets, like currencies.
