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.
we just need to bank interest, to cultivate the money, without the risk of losing