Well, banks would still take from people as much as they can. They will force governments to regulate btc, this would make the currency just another asset they can control. End of story.
Yes the revaluation of the bitcoin will get in the world and this is the reason why the value and the price of the bitcoin is increasing more and more I hope this is the time to make the banks accept the bitcoin and to hold for the best time I can see how fast the bitcoin growth and the power increasing, the banks are good to keep the money but this is not going the benefit as it cannot increase the value and the price.
Yes banks would not get affected in any way due to the use of digital currencies because even now they are used at the highest possible scales in all the financial matters and even in today’s world the whole of the economic growth whether it is about the local transactions or international relations.
Even now many of the people trust banks and keep their money in the accounts rather than using digital assets only due to the lack of confidence on the stability of digital assets.
There's some truth in what you say, but I don't think it's that straight forward. Banks currently make a lot of money, especially merchant banks and brokers from the exorbitantly high fees they charge. New FinTech companies using blockchain are going to seriously disrupt their revenue streams. Take Trade.io for instance (
https://bitcointalksearch.org/topic/tradeioann-ico31169749-partner-civic-bancorhitbtc-okex-2367245) who's trading platform will allow traders to trade not just cryptos, but also Forex, Commodities and Equities to name a few, with minimal fees.
Retail (or high-street) banks also rely heavily on lending, transfer and penalty fees, and like the merchant banks, have lost a lot of credibility in the public eye. Take the WellsFargo fiasco for instance. Complete erosion of trust. So do people still trust banks to store their wealth? Somewhat, but trust is declining rapidly due to illegal and predatory practices.
Many nation states are, as others have mentioned on here, are in the process of developing crypto versions of their fiat currencies. Once they do, cryptos will become fully main stream and accessible via mobile payment systems and crypto linked credit/debit cards. Once that happens, the impact on traditional banking will be down to whether they adapt and become more transparent, or try to push back like some of the luddites that have been so vocal recently, and get replaced by new nimbler institutions.