Fractional reserve banking isn't exactly a new thing and I am pretty sure the EU rules mean that banks have to have 3% of total lending in reserves.
Also online cryptocurrency is not the future. It's far too complicated to use, far too easy to be scammed and far too easy to lose your funds when they are stored exclusively electronically. The only reason for bitcoins atm is to be anonymous for illegal activities. For everything else normal currency is just so much easier and better to use. And in the end if you have to store the currency in a central system, like a lot of people do atm, will we not just end up with more instances like Mt. Gox? I'd rather have my money in the bank than some dodgy bitcoin company that could steal all my money tomorrow.