Yes, you're right. The point is, with bitcoin, there's really no need for banks.
It's easier (and safer) for me to hold a million dollars in bitcoin than a million dollars in cash. If I had a million dollars in cash, I'd be constantly worried that someone will find it and steal it. Hence the need for a bank. I feel much more capable hiding a private key, which is just information, than I do hiding 10,000 pieces of paper, which is physical.
Its not about need. Its about somebody paying you interest on your money. To the degree bitcoins don't pay interest, they are less valuable than hard currencies.
No one opens a bank account for the interest paid. Most accounts barely pay a tenth of a percent annually, maybe a quarter percent from a credit union—meanwhile, inflation is 2% a year. You’re losing net worth by holding USD in a bank account.
