Gold, as a monetary metal will go away.
Not sure how fast because timing relies on a few inventions.
One invention will be to vibrate gold out of the ground.
Basically, gold becomes almost as plentiful as sand in a desert.
Just go get yer shovel.
The other invention is based on creating true money.
Imagine the difference between bitcoin and the dollar.
Now, there is a step, just as wide, from bitcoin to what i can best describe as true-money (unfortunately, there is a step beyond that...)
Now, while gold is still a monetary metal, its price is WAY!!!! to low.
So, at some point the manipulation ends, and gold skyrockets.
Be sure to trade it for real stuff when it does skyrocket.
If the supply is artificially low and they have more ways of extracting it, why would the price go up not down?
Its timing.
The price goes up because "gold standard" and the manipulation gets removed.
The price goes down because "hey look, free gold" and only the bad guys have tons of gold, lets not deal with them any more.