Fiat money like coins or paper money is a symbolism that represents the status or a person and their country in my opinion. Also it dies have the same way of getting its value just like gold, silver, diamonds and even cryptocurrency and that is by us the people or market putting value in it.
Not only by putting value into it, it's about putting believe into it, that's always been the most important factor of money in the history.
These days our money is fully centralised and it's not in circulation because of the people's believe anymore, but fully because of the force.
It's a very bad change in my opinion.
That's why BTC/Blockchain is a good thing.
The sad thing is the government can print any papermoney as they want and we dont even realize it that our paper money's value is decreased.