There are a lot of types of investments but the most unique and private way to preserve one's wealth is to store your money in safety through investments. One of the great investment is to buy and sell gold. In some countries these can easily be bought or sold of the major banks. But in other countries as well, there are coin dealers which provide the same service like these army challenge coins. So if you have still old coins in your home, maybe its time to make them into real money.