I look at it this way. The economy plunges. Barter becomes the way to go. I trade you something you want for something I want. This supposes a total economic collapse -

Gold, while it has value, is of no value. I can't eat it or plant it or wear it as clothing or use it for much. I may take some, if I think the economy will regain it's feet, but not much.

Land doesn't move. I can sell it for cash, if someone has cash. At best, I can use it to make a garden.

Trade goods. Ammo (think .22LR, 12ga birdshot) for hunting. Knives. Toilet paper. Liquor. Clothes. Tools. Cooking supplies. All can be used or consumed. How-to books get rented out by the day/week, with considerable collateral. Fishing supplies.

Sure, invest in gold. But it today at $1700 an ounce, and watch what happens when you can't sell it.