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. 
Actually you'll lose money with a savings account. Inflation eats that shit raw.Since bitcoins are not that widely accepted yet I'm forced to use a bank account, I don't like banks at all to be honest. Last time I visited a bank I wasn't really pleased with the service since all the costumer service personnel were like robots. You can't really ask genuine questions.