I think bitcoin will not replace the bank because Bitcoin is the first non-centralized digital currency,Like money in general, Bitcoin can be used to store wealth and to purchase goods electronically,While banks regulate the circulation of money such as the euro and the dollar..
True; the bank has a big support from the country which the Bitcoin has not. Bitcoin is a paradise for the common people which are investing in it to surpass their limitations in a financial way and to achieve wealth with the smart investment. There are taxes that are in some kind of way connected with each country separately but for the Bitcoin, to replace banks it would need a miracle.
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I am also a holder of some particles of the Bitcoin but personally, I would want for the decentralized currency to replace the existing ones. The new problems would arise then and there would be even more poor people than before because the government would for sure find a way to manipulate the market that would lead to further bankruptcies and losses of the common people.