Question

what is study of coin​

Answer 1

the study of coin is called Numismatics

Answer 2

Explanation:

$\huge\mathfrak\red{☆ANSWER☆}$

Coin collecting, also called numismatics, the systematic accumulation and study of coins, tokens, paper money, and objects of similar form and purpose. The collecting of coins is one of the oldest hobbies in the world.