Who would pay for a Bitcoin bank? There is no company that runs Bitcoin, just a Bitcoin foundation and development team. And no government would run that kind of bank. I think the only way this could happen is if a private company ran Bitcoin banks and charged customers fees for their services. In other words, it would be like the online exchanges except a physical building. It’s possible it could work but so much of cryptocurrency activity is done online it would only serve a small part of the population that was not computer literate. In some countries this might work better than in others.