"But even if there is general raw commodity price weakness for several more months, or longer, the bust cycle will end and then a boom cycle will begin. This is a historical fact. It’s also a historical fact that during the worst periods of cyclical downturns in raw commodities, that is when the best longer-term value-buying opportunities occur. It’s likely that presently several major raw commodity markets are “value buys” that will last for several years to come."

http://www.kitco.com/news/2014-10-14/Important-Longer-Term-Trends-Continue-To-Play-Out-For-Gold.html