FDIC is backed by the US government which in the financial world is considered the safest type of investment, the rate the US government is considered the "risk free rate". If you want the protection of the US government but you have to much money for a savings account it's pretty simple, you buy US treasury notes. Those have the same backing as any FDIC insured account, you will get what the note/account says as long as the US government doesn't default on their debts.
I wouldn't put all my eggs in one basket though even if it is the US government and supposed to be the least risk. Diversifying is the key to safety. Which is a pain if you have tons of money thus why people with tons of money always have money managers unless they make it there own full time job to invest there own money.
Cute, but only if you haven't been paying attention to the news for the last few months. First off, fuck what the wizards of Wall St think is safe. Second, even governments fall. And the U.S. ain't looking too great from a financial standpoint at the moment.