If the market crashes the PM stocks and physical silver will go with it. Physical gold will probably hold up. When the market recovers the PM stocks will be among the first to move back up.
I myself do not expect a full on crash at this point but a lot of volatility instead.
This is a slightly different situation than 2008. In that one the senior financial companies got in trouble and were bailed out by the governments. This time it is the governments themselves that are the cause of the crises.
If you move your money to treasuries you are moving toward the problem not away. I can't see this as a long term trend.
Put yourself in the shoes of the Greeks. Your money is losing value everyday. Do you move to gold, stocks or US dollars? Only a small percentage have to move to gold to push it up.
I like Chris Martinson but I disagree with him on this one. The Europeans will print money because the electorate will force them to.