I didn't say depressions weren't possible under a metallic currency system. In fact, if you actually took the time to read the document I originally cited you'll find a dissection of many of these depressions and the following conclusion. The frequency and depth of these "depressions" were much lower under a metallic currency then that of a fiat currency. Depressions are "normal", like storms, they come and go, what makes them "economy killers" is the massive use of leverage which is only possible under the arbitrary fractional reserve system e.g. the great depression and the 2008 banking collapse.
The fallacy is that government can actually shield us from a depression actually occurring to begin with. Our currency is based as much on confidence these days as it is on GDP, probably more so.
In closing, I'm not here to win a flame war, I frankly don't care. My goal is to get just *one person* to think twice about business as usual wrt fiat currency and seek the truth for themselves.