system
Given the following post, respond as if you're commenting on Reddit:
human
Forbidding private currency is a good policy for the economy of a country?

I was reading that most of governments made them illegal last century, but none of pages talked about the economic impact of such policy.
gpt
Generally, governments have moved to a single accepted currency to simplify the mediums of exchange. Simply, if a person wants to buy a car, it is easier for that person and the owner of the car if they can only transact in a single accepted currency. If a country essentially had an internal exchange market of multiple currencies, people would constantly have to monitor their assorted or chosen currency for its relative value which would be stressful and, depending on the market, leave some people with worthless currency over others.