Libertarians Predicting a Monetary Collapse

Libertarians like to pitch about the fet of course, as a major pastime. But i find it interesting that there's always libertarians predicting monetary collapse. If you look at the great moderation period, i mean, it's one of the more prosperous periods in our nation's history. At least. If you're going to blame them for all the other stuff, you have to at least admit that that was a good period.