All fiat currency will continue to fall in value due to inflation caused by government debasement of the currency. Governments cannot continue spending or even pay interest on their debts by any other means but debasing currency.
The catch is that you must have physical possession of the gold, with all of the risk and costs that entails. Receipts for precious metals stored in a broker warehouse will be dishonored time and time again.
The other catch is that if things go full breakdown, the economy will revert to simple barter. You will trade that ounce of gold for a chicken unless you have something more useful in stock. Maybe ammunition will become the new currency. I would hedge with stocks of 9mm and .22 caliber
Actually it'd be smarter to keep the ounce of gold and give a couple of pre-1964 dimes in exchange for the chicken.