You need to be in a position to hold your PM (and commodity related stocks) through any hyperinflation until a new monetary standard is introduced. I like to have most of my "cash" with Gold Money along with a shoe box full of junk silver, just in case.
I don't actually believe we will have a Weimar style hyperinflation. I expect high inflation rates (not more than 20% on Government stats) over a period of years to erode the real value of debt before a re-linking of the Dollar/Amero and the Euro (the major reserve currencies and holders of most of the central bank gold reserves) to gold at a much higher level (multiple thousands).
Then we have two sound currencies backed by gold and the debts are manageable again. Of course, those of the middle classes who didn't plan ahead and buy hard assets are still more or less wiped out...