We've been printing money so fast its a minor miracle that the presses have not caught fire. When viewed against the Euro, US currency is getting to be close to worthless. A couple of cups of coffee and a few rolls are close to $25 American money in Paris now, and some currency exchanges no longer exchange dollars.
The FDIC is a government insurance policy, what controls money is the Federal Reserve and that's a whole different ball game. It took me two 50 minute lectures in college to try to begin to explain the Federal Reserve system, what it is, who runs it, and what it does, and I don't think I even got close. The fact that it's also about as boring as any topic I can think of didn't help - nobody ever needs sleeping pills at a lecture on monetary policy. Plus the basic question of currency in the modern age is so strange that I don't think most people can even begin to comprehend it right off. Most people want to think of it as real, when in fact, its mostly all in people's heads.
And its possible to have up to $600,000 insured in one bank, and of course, you could put $100K in 500 banks and be covered for $50 million. Though I doubt most of the people reading this have over $100K in any single account.