The Evolution of a Goblin to the Peak - Chapter 14: Red Fur Bear concede

... will use this stone as a currency to enter the city.

Even though some of the countries in this continent were quite advance they still haven't changed the currency system. The currency system was arranged base on the magical value. It was arranged like this; copper coin -› gold coin -› silver coin -› platinum coin. Copper and gold have low magic conductivity so their value was lower than silver and platinum. In this world, where magic reigns the value of gold dropped.

"A piece of sil ...