Bank account is still necessary, we are going to have a hard situation if we don't have any money in the bank and if we only have a cash. I feel uncomfortable when I have too much cash in my pocket, I feel like I'm obligated to spend it, that is a yikes for me I know, but honestly having a bank account to save your money is important these days. You can't spend bitcoin anytime you want, you would not like spend in undervalue.

I know there are some banks that offers this kind of money transfers, I'm not sure if it is on coinbase or in any other exchange but I'm pretty sure I've read somewhere that there are some.