besides because the transaction process is easier with bitcoin compared to the bank. bitcoin also provides price advantages that always go up and the increase is very high whereas if we save money in the bank our money will be deducted by admin fees and get a small interest.
Using bank services in my opinion is too much a requirement because it must include an identity, besides the fees charged are more expensive than using bitcoin. Having bitcoin is also used to make payments as well as investments, because the price can go up so that it can get bigger profits.
However, for certain countries, bitcoin is not popular, so it remains the most important thing to use bank services. In my country, bitcoin can be traded, but cannot make payments. Therefore, when buying bitcoin into a bitcoin exchange, it still uses bank services. So the two complement each other.
In my country was the same so, bitcoin can not be used as a tool payment because of a payment legitimate according to the legislation is the eyes of the physical force in this country, bitcoin not allowed to be used as a tool Payment. Use the services of the bank higher it costs but I think we still need the services of the bank to to convert bitcoin into the physical money