Gold Coins - In one of the oldest and most valuable currencies. Already used before the establishment of the Ancient Lizardman Empire. A gold coin is worth 5 silver coins.
Silver Coins - The Kingdom of Froturn used it first. A silver coin is worth 5 copper coins.
Copper Coins - The Ancient Lizardman Empire used it first. A copper coin is worth 100 Batki.
Batki - Wooden coins. The least valuable currency. The then nomadic and barbaric (now civilized) humans used it first.
The sale of gold coins in the world
A gold coin is worth 5 silver coins.
A gold coin is worth 25 copper coins
A gold coin is worth 2500 Batki.
The sale of silver coins in the world
A silver coin is worth 0.2 gold coin.
A silver coin is worth 5 copper coins
A silver coin is worth 500 Batki.
The sale of copper coins in the world
A copper coin is worth 0.004 gold coin.
A copper coin is worth 0.2 silver coin.
A copper coin is worth 100 Batki.
The Batki sale on the world
A Batki is worth 0.0004 gold coin.
A Batki is worth 0.002 silver coin.
A Batki is worth 0.01 copper coin.
While this game takes place in a fantasy world, because - to be realistic - well .... This game takes place in a medieval world.
And inflation existed in the Middle Ages (depreciation of the currency) .... so do not be surprised if inflation is rearing its ugly head in one country, and your character starts havingfinancial problems for "no reason".