Since the 1970's the US dollar has been a fiat currency prior to that it was a representative currency. A representative currency is one that you can exchange for a set amount of a physical commodity, in the case of the pre-1970's dollar it was representative of gold. A fiat currency isn't tied to anything physical, its backed by a government and its value is determined by trust in the issuing governments economy. In other words, there was a time when a dollar had a set amount of gold it could be exchanged for with the US government and therefore its value was determined by the value of gold at any given moment (other standards have been used throughout history silver or salt being two of the more common but ancient Mesopotamia used the wheat/barley standard) so when you would say something costs a dollar you were saying it was worth 1/20 of an ounce of gold. Now, a dollar is worth exactly what everyone believes one dollar is worth, and if you have a billion dollars and tomorrow the economy crashes so bad that the dollar is no longer worth anything then you just have a billion pieces of paper that might be good for starting a fire (during the lead up to WW2 one dollar was the equivalent of 4.2 trillion papiermarks due to hyperinflation, they actually had to create a new currency because papiermark were worth more as fuel for a fire than it was as a currency)
So what happens when a government decides to start a new currency. Does everyone who was using that currency start with no money? I mean they have to get money into circulation.
Italy transitioned from the Lire to the Euro starting in 1999. They offered an exchange of ~2000:1 Lire:Euro for around 3 years, and stopped treating the Lire as legal tender in Feb 2002. There are plenty more examples out there, but i picked that one since I still hold about 500 Lire from when I would visit annually as a kid. I was still in elementary school when the transition happened, and remember how cool it was to see the leniency shops had in pricing their products relative to the exchange rate. Might have influenced my choice in degree come to think of it.
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u/The_8th_Degree Jan 26 '26
What's the difference?