Gold prices have been used as a store of wealth for centuries. Gold prices can be quite erratic and have a history of massive swings. One issue with gold prices is that supply can and does come back into the market. Unlike other commodities that are used up, such as oil, when gold prices move up, people can sell their holdings, which can be melted down and added to the world supply again. High gold prices are usually a sign of a lack of faith in paper money, usually due to inflation, which erodes the value of fiat (paper) money.