A commodity is only worth what someone is willing to pay for it. Duh! However, you can't argue with the market or the trend. I find a 49-day moving average trend is great for trading crude.
There's plenty of crude floating around but no-one can refine it because no new refineries were built while oil, gas and the crack spread margin was so low. Now some refineries are being built again and retrofitted it will take a few years for the crude price to settle down again.
For silver, gold, copper etc. new mines are being built but average grades are down and it's more expensive in general to mine these days. It's a cruel irony for the mining industry that when more supply finally returns to the market, the bull is exhausted. The industry then goes through a massive consolidation phase as the majors buy up all the smaller miners on the cheap.