You can open a futures account when buying precious metals. Futures support two-way trading. Buying precious metals means seeing more. Investors believe that the price of precious metals will rise, so investors will make more orders. When precious metals rise, investors will close their positions and earn the difference.
Buying and selling precious metals means shorting. Investors believe that the price of precious metals will fall, so investors short orders, sell at high prices and buy at low prices, thus earning the difference.