Buy land, junk silver, fractional gold, food and ammo.
That's my investment portfolio for the past 5 years.
Silver dollars and stamped 1/10 oz gold bullion cubes do that.
Anything else in times of crisis will have a value that can be disputed. Think what happened when people cashed in grandma's jewelry for melt-down value. They were at the mercy of the person buying it. And gold mutual funds or certificates saying it's being safely stored.....well, that's just plain dumb.