Bitcoin can be the future bank all over the world. It might be similar value of World Bank.
Now a days there are so many big transactions are done with crypto currency. If people dont want to tell globally about their transactions they may use crypto in big number of amount in a single transaction, and nobody else can recognize that why and what they do transfer.
If there any kind of illegal activities involved in that transaction then if there is bitcoin bank exist over there then some kind of transactions may be stop by the bank.
In that case all the government make bitcoin bank in future, they will ask for all accounts details and the person who access the account. If all holders gives them details then it will be it safe or not?
I am not sure about this. Bitcoin does not need a bank, because Bitcoin is what shows that the bank is unnecessary. In a way, Bitcoin is the bank. Moreover, Bitcoin stands again centralization, so making it centralized via organizing a single bank responsible for stuff is betrayal. At the same time, I believe that some banks will start to allow people to keep their Bitcoins there and perhaps even open Bitcoin bank accounts. I am also pretty sure that some people would even do that because it gives someone to blame in case something happens, the feeling of safety and other benefits like when you have to prove you have money for visa/credit or something else, you can make a Bitcoin bank statement.