I think that gold could lose its value in the next decades, because there are already plans and ideas to mine valuable resources like gold and platinum on asteroids.
I think you mis understood the precious metal pundits. What they are seeing is that some kind of asteroids will be coming to earth with huge chunk of gold in it. But that is not they're strategy per se,. Do they really need to go out there and mine them? Or are they just going to wait that something big hitting earth?