If you are really worried about the USD, then you should start looking at diversifying your cash into foreign currencies (you can buy foreign currency CDs, and unhedged foreign bonds and stocks or even open an account abroad to hold your Euros, Swiss Francs, British Pounds or what have you). Off course Gold is not a bad thing to hold (in moderation though).
...and maybe the USD isn't so risky.
... and about 2% in physical precious metals (gold and silver).
Ah hah! Meaning coins buried in your backyard?
A purist gold bug wouldn't buy ETF like GLD, or SLV. In case of "real trouble", who's to say you would be able to log in your Internet brokerage account to get at that shiny metal?
People hiding treasure around their property better leave a treasure map to their heir, lest it becomes lost like in the following story. A man hid $182,000 in the wall of his home during the Great Depression, to be discovered by the present homeowner. This windfall bounty caused a lot of grief, however.
Cash found in Ohio house's walls becomes nightmare - Yahoo! News
This is an editorial about the US dollar collapsing. What do you folks think of this? Is it a reasonable possibility? Bill