Accordingly, interest rates not only show the time value of money, but also function as a tool to realize the functionality of money. Since the beginning of the abstraction of money, coinage has benefited transactions through its loose connection to value/products. This is the idea of ​​fiat money, paper money made legal by government decree. A formal gold standard was established in 1821, when the value of fiat money was defined in terms of gold. However, no one realized that this overshadowed the darkness of the connection between money and its intrinsic value. When the expansion of gold reserves grew more slowly than that of the national economy, the existing quantity of money, based on the gold reserve, could not meet the needs of growing transactions. As a result, this monetary contraction has hindered economic growth. Therefore, the gold standard was abandoned after the Great Depression in