this includes rare coins and how coins and why they are made

A coin is a small, flat, round piece of metal or plastic used primarily as a medium of exchange or legal tender. They are standardized in weight and produced in large quantities at a mint in order to facilitate trade. They are most often issued by a government. Coins often have images, numerals, or text on them. 

Numismatics is defined as the study or collection of coins, paper currency, and metals. While coin collecting can require both time and effort, if you invest in learning about valuable coins and how to collect them, you’ll find that engaging in coin collecting can be a rewarding pastime