Fiat money by definition has no intrinsic value. It's value is given to it by social consensus and government backing. Is this lack of intrinsic value a signifigant weakness though?
Some suggest the alternative of gold or silver standard currency. A silver standard currency for example would not have the same problem of relying on government backing. You see, a person can exchange their silver-backed bill for actual silver at any time with... uh.... with the government. Right. Hmm.
The problem of social consensus is similarly done away with. After exchanging your bills for a few shiny ounces of silver you now have a highly valueable resource. Just as food is valued because it can stave off hunger and wood valued because it can build a house - both being things that not just a select few but in fact everyone can always make direct use of - so too is silver valued for... well... I guess if you have no direct uses for it you can exchange it for some food or wood. Yes, silver will always be useful for buying things from other members of society because society agrees... wait a minute...