Money is everything we get in life. Maybe some of us wish we had more, but when we see it, we will all realize it, whether in the form of coins, bills or checks. It's hard to imagine how people without money manage.<br>In the earliest period of human history, people used it to exchange goods directly. They will exchange some things they need. For example, they may provide tools for food. This exchange method, called "barter", has many disadvantages. Certain good may be different to carry, they may not last long, or may be impossible to divide into small units. Some good people may be difficult to carry, they may not last long, or they may not be able to split into smarter units. Compared with other commodities, it is also very difficult to know the value of a thing.<br>According to historians, the first money, as far as we know today, consisted of gold coins produced 2500 years ago. Gold, as a very precious metal, was once a suitable material. The introduction of gold coins is acceptable to everyone, and they are still used at the beginning of this century, although they have been replaced by paper money and coins made of ordinary metal.
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