Gold. It's a precious metal. We know how much is in circulation and we know how much is going to be mined next year. Many of us have a little gold. I, for example, wear a ring of gold on my left hand, ring finger.
The price of gold is dependent upon a number of things like supply and demand. I see that gold today set a new record price, of $1,147.72 per ounce.
Basic economics tells us that the price of gold is very stable and things fluctuate around it. Like the value of the money spent on it. Gold maintains its value very, very well. What doesn't maintain its value so well is the money spent on it.
In short, when gold prices are high, your money is worth less. That's the short answer for monetary policy.