I will try to explain with real world example. Russian government in early 90s printed money and pay a person a salary. The person took the money and exchanged them on dollars in the same day. Dollars are the real money. Many goods like electronics had prices only in dollars in stores. You can pay in dollars or can change your dollars into rubles by a new rate which grew everyday.
I’m struggling to understand your first paragraph and I think this sentence has a typo?
I will try to explain with real world example. Russian government in early 90s printed money and pay a person a salary. The person took the money and exchanged them on dollars in the same day. Dollars are the real money. Many goods like electronics had prices only in dollars in stores. You can pay in dollars or can change your dollars into rubles by a new rate which grew everyday.
I read it as “People would use other forms of money for trade if the government fiat ever turns into monopoly money”