"Proclamation by President Franklin Roosevelt, April 5, 1933
I, as President do declare that the national emergency still exists; that the continued private hoarding of gold and silver by subjects of the United States poses a grave threat to peace, equal justice, and the well-being of the United States; and that appropriate measures must be taken immediately to protect the interest of our people. Therefore, pursuant to the above authority, I hereby proclaim that such gold and silver holdings are prohibited, and that all such coin, bullion or other possessions of gold and silver be tendered within fourteen days to agents of the Government of the United States for compensation at the official price, in the legal tender of the Government. All safe deposit boxes in banks and financial institutions have been sealed pending action in the due course of the law. All sales or purchases or movements of such gold and silver within the borders of the United States and it's territories, and all foreign exchange transactions or movements of such metals across the border are hereby prohibited. "
Blue has some further background info over at his place. Click the above to go see.
Just because you don't think it can happen, doesn't mean it won't happen. And if it happened once, it can happen again.
If it does happen again, who "sets" the price? The Gov, has shown it is willing to set arbitrary limits at it's own whim in ex: GM Bankruptcy Stock shares price.
As I said. Who says it cannot happen again.