I really don't know what Dunning Kruger is and I don't care, but people who think differently often make a lot of money. And 'stacking' gold bars waiting for Armageddon hasn't been one of them.
Just go back through the gold forum - most goldbugs from a few years ago have long gone, new ones turn up every few months as the 'veterans' look crinkly lipped at their declining returns and throw in the towel.