An aunt told me before that while collecting something can be a great past time, collecting something that will eventually cost more than they are currently selling for would be a better idea and even an investment. She told to collect or invest in different types of gold coins as they have very high values in the market today. It has never been known to depreciate and is not dependent on any foreign currency! f you have a coin collection made of either gold or silver coins you may have enough pure gold and silver to trade it in for cash. Many rare coins are minted and their gold and silver value is guaranteed making these collections very desirable for a gold buyer.