What is the ruling on one who buys gold and sells it again?

The questioner : What is the praiseworthy approach in the process of buying gold and selling it a second time?

The Shaykh : As I mentioned earlier, paper currency has no intrinsic value. It is like gambling, as it rises and falls, and it is not a commodity like sugar, rice, or the like. No matter how much a commodity falls or rises, the value is relative, and this is the nature of trade. However, paper currency is gambling, especially since it is in the hands of some major countries. If it is in their interest to lower the value of the dinar, which they possess, namely the dollar or the pound sterling or the like, and it is in their interest to lower it, they lower it. If it is in their interest to raise it, they raise it. With this raising and lowering, other currencies are affected. Gold, however, is not like that.