What is the real meaning of currency circulation?

Question 1: The meaning of currency circulation is circulation itself. For example, if you have a sausage and want to buy a bottle of water, the boss selling water wants to eat a bag of peanuts, and the boss selling peanuts wants to eat a sausage. So how do you get a bottle of water? You must find the boss who sells peanuts and exchange sausages for peanuts in order to exchange a bottle of water. You might say, just give the sausage to the boss who sells water and let him exchange it with the peanut buyer. So, why does the water seller believe that you can exchange sausages for peanuts? If the boss believes that a sausage can be exchanged for a bag of peanuts, then sausage is money. There are only three kinds of goods on it. In reality, what everyone has is different from what everyone wants. Aren't you tired if you find someone to change them one by one?

Question 2: It is also a question of ideas. The meaning of GDP is gross domestic product, representing an output level. However, the unit of milk is a bottle and the unit of books is a book, so how to calculate the total output? Naturally, we multiply several books by several books to get the total, and we get the total with several bottles of milk, which adds up to how many total output values.

Then, another important question is, why is the price of milk worth this price? How to determine the price of books? Did you run over and buy a bottle of milk with 6.5438+0 million yuan, so the output value of our country increased by several hundred thousand times, and the price of milk became 6.5438+0 million bottles? Obviously not. Because it is your freedom to do so, but others in society will not do so.

So in your story, two people eat shit from each other, which is their personal behavior and has nothing to do with output value. If unspecified people in society think that watching others eat a piece of shit is worth 200 million yuan, and this piece of shit is listed as a transaction, and unspecified buyers will really trade and enjoy eating shit, then this time can be counted as the tertiary industry and included in GDP.