Fiat currency is a currency that a government has declared to be legal tender despite the fact that it has no intrinsic value and is not backed by reserves. Fiat money is soley based on faith. As in “The full faith and credit of the US govt”.
The thing that kills fiat currency is hyperinflation. As the US government continues to increase our debt and print (Devalue) more of our fiat currency, inflation increases until finally it kills the currency altogether. Every fiat currency ever introduced since the beginning of civilization has failed. Ours will also fail and increasing the debt will just hasten its demise.
Buy fractional gold and silver.
We are still in a deflationary spiral with the three areas that everybody sees standing out as anomalies i.e. food, fuel, and medical care. Food and fuel are going up due to speculation and hot money looking for ways to park itself and medicine is being affected by Bork Obunga's machinations.
Bankers and pols fear deflation a great deal more than inflation since they have vastly less control over it.