Currency

Currency is any item used to exchange goods or services, as a bartering chip. The many nations of the world use many different types of money, and prices fluctuate, but several forms of payment stay generally stable, and are accepted almost universally.

Coins
One gold coin, generally is worth roughly 50 Silver coins. A silver coin is worth roughly 100 copper coins.

As a reference, A loaf of bread costs anywhere from one to three coppers.

Gold Coin
This type of coin is very rare, and often only used by those who are well off. A single Gold coin can cause quite a deal of trouble, as most people would do a great deal to get one. Some people go their entire lives without seeing such a coin, most never own one.

Silver Coin
Often called the merchant coin, this is a coin with enough value to be useful to trade, but cheap enough to be used by the commoner. While a commoner would usually not amass more than a few silvers at a time, it is not unheard of commoners saving up over their entire lifetimes to acquire a gold coin.

Copper Coin
The working mans coin, this is a coin with little value, but accounts for the most coins in circulation. A commoner will often have up to a dozen coppers on hand at any given time.