Be used, since the invention of coins, gold coins and cash and investments. A currency that is exclusively or mainly of gold is a gold medal. Gold Coin is a very practical way to value ratio that is the true value.
Gold are useful because they are interchangeable, are used as a substitute for the difference between buying and selling low-value policies, it is easy to carry and, if broken into small pieces of value does not change. Some people buy the collectors of gold coins to buy the investment, while others see as a hobby, since gold coins are rare.
