[kaleidic]

Yes - that's right : people mostly shouldn't need to hold such high Bitcoin balances to buy things. What's in the way is the state interfering so you can't change dollars for Bitcoin with your bank and there aren't services that do that which are convenient enough. In time this will change so you can just make Bitcoin payments from your checking account.

[taysic]

"In time this will change so you can just make Bitcoin payments from your checking account."

If Bitcoin could displace banks, what incentive do they have to displace themselves?

[MarkMc]

Banks make money by borrowing from one person and lending to another at a higher interest rate. They can do this in Bitcoin just as well as in US dollars.