Addendum to Scruffy's comment:
We all know that more dollars are printed thus driving its net worth down.
Interest rates on the dollar could reach 0%, so who will want to keep it. With the PM prices being suppressed mines are begining to close. Inevitably ( silver being a prime example) the price must rise and likely dramatically. These types of events while delaying the inevitable are at the same time building up more pressure for the whole thing to come tumbling down.
Any mine in today's environment should cut back to preserve it's health and thus eventually to be in a desirable state when the big event happens.

I became suspicious several years ago ( 2000 or so ) and convinced of the inevitable about 2003 when the tech bubble was still at play and I was looking for the next bubble. I have been waiting now five years and you have got to give the Cartel credit, they have been able to postone it for quite a long time. The Cartel has cought me off guard.

So I am impatiently waiting for that expected Kaboooom!