You can do this without needing a bank, it's P2P cash money.
Any person anywhere in the world is want bitcoin and has equal value in money or
products that you can exchange currencies without the need for a broker bank.
you can deal using p2p sites that offer too many bitcoin to cash exchange without banks.
when that person ia within your location it is easy, but have thought of those outside your location? we are not even talking about the huge risk involve in carrying physical cash around, as much as we hate the idea of using the bank and wanting to boycott them they still plays a very significant role in our daily transactions, p2p has limitations and can't be rely upon for safety reasons.