I think this is a big NO.We know that every banks aim for one only goal.That is to centralize an decentralize financial system.And bitcoin is a decentralized cryptocurrency and if banks do happen many changes will happen in bitcoins.So i think having bitcoin banks is not good for all of us bitcoin users.
yes, we've got our own wallet, we do not need bitcoin bank. why we must keep our bitcoin where others will control our bitcoin. I think it's certainly not a smart decision. bitcoin should be spread evenly so that the price can be more stable. We better use our bitcoin as investment in trading because big capital could give nice profit.