It will happen one day that banks will disappear but it is hard to that it will happen due to Bitcoin or due to digital fiat transaction. If world start to do  digital transaction and technology improves than it is possible that there will be no bank office but still banks will be maybe digital banks. 

Banks will not vanish as they are here because the services they offer are needed in the economy. In order to make sure their position stays as solid as it is, they are improving their services to such a level, that you can't deny that what they offer isn't all that bad. Exactly this is already happening. On top of that there is also the support from the governments that gives banks extra weight.

Bitcoin and Banks are completely different. No way!

Both have a separate value, The Banks are under control of our government, and the Bitcoin is ruling online gambling industry. Our governments need banks to control our economy. And the banks will pay tax to government so the banks are legal in all country. Why the bitcoin is not legal in many countries means in BTC transaction govt will not get any income and people will use this currency to do illegal activities. That is why BTC is illegal in many countries.

When goverment don't have income, i think it will make country fail. It means no more construction.

Quite unlikely Bitcoin would make banks dissaper, at strongest case scenario it'd either reduce the reliance on banks for funding and payments, or force banks to implement Bitcoin.

Bitcoin prospects are still unknown, whether it can replace the banks largely depends on the attitude of the government, it is theoretically possible, but does not rule out the emergence of more advanced technology.
Perhaps the trend is that banks should support bitcoin development. After all, the encrypted currency has proven to be a cost-effective transfer or remittance.

nope it will not happen, banks will continue to exist because the fiat will always support the bank. because fiat fiat owned by the government of course will always persist and live until whenever
including on banks

Either way, it's not happening. Bank will not be replace by bitcoin of course it's a different thing and we cannot compete with fiat. People will always support bank as it is legitimate compared to bitcoin and government supports bank.