Gold is a material that has been valued by humans over history, because it's scarce, nontoxic, and nonreactive (it doesn't degrade or decompose). Its stability makes it an excellent standard to base value of other goods on, and its aesthetics only increases that notion.
The fact that it's traded as a commodity today doesn't change that. Fluctuations in the currency value of an ounce of gold doesn't make gold seem unstable. Quite the opposite, it makes the printed pieces of paper we call currency today look all the more unstable.








