I’m going to write up a longer discussion later, but for right now take a look at this snapshot from page 116 the 2013 FDIC Annual Report:

Notice that in 2009 and 2010, the FDIC fund was negative, meaning it had to borrow money from the Treasury just to make whole the depositors of failed banks. As of 2013, FDIC has a fund of about $47 billion, with which it insures commercial deposits of more than $6 trillion–a coverage ratio of 0.79%.

So remind me why our money is safe in the commercial banks?