A gold bullion is a standard of money that uses a specified quantity of gold to determine the value of currency that is convertible in other countries. Basically, if you want to invest gold the most traditional way of investing in it is by buying bullion gold bars. In general speaking, bars carry lower price premiums than gold bullion coins. That's why I would like to buy gold bullion if I have money, this is something I'd love to invest. The value never goes down compare with stocks market value.