It all depends on your choosing, whenever you like the flexibility of having control of your own money, or to have the ability to earn interest from your savings account, I would like to state that each has their advantages and disadvantages. So until Bitcoin becomes a mainstream currency, it is best to use both a bank account and a Bitcoin wallet. Just my opinion. 
there are advantages and disadvantages of both, the best is use bothI like the bank because there is interest
But I love bitcoin because there are huge returns compared to any bank interest. But still bitcoin goes to mainstream I will be forced to use both bitcoin as well as bank account. But definitely bitcoin will give more retunrs than any bank interests in long term basis.