As it stands today, you can lend at your coins at a yield rate close to the borrow's lending rate. That effectively makes all lenders, collectively, "the bank". It also means that borrowers will get a competitive rate for borrowing against their collateral.
This will end the days of getting 0% in your savings accounts while the bank is getting 10% lending out your money once people realize they can lend out their dollars themselves for a much higher yield.
It also lets you lend out your speculative crypto investments. Imagine if you could buy AMZN or NFLX and also lend it out to other people on margin. That's exactly how a margin account works, but of course your brokerage isn't going to let you do it. Crypto lets you play the role of issuing the margin rather than borrowing it, if you so choose.
People that are dismissing crypto have no idea what a revolution in finance this is going to cause.