Actually precious metals in an oh [shucks] situation are a suboptimal choice for an investment. Land is by far the best investment for the oh [shucks] situation, but precious metals so run a damn fine second fiddle.
The problem with land is that it is stuck all in one place and you can't sell little pieces at a time.
And the problem with precious metals is that they have no intrinsic value. Land on the other hand can grow food.
If there isn't a flood, or a drought, or high property taxes, or insects, or radiation, or a bad crop, and the government doesn't zone against farming, and you stay healthy enough to work the land, and you have farm equipment, and there is a market for your food. Gold on the other hand can be taken n spent anywhere. In Zimbabwe, for example, owning land didn't help because the communist government just took it! But a pocket of gold bought plenty of food on the black market

And what happens when no1 accepts gold?
Well that would be a valid point if it had ever happened before in the last 6,000 years.
Oh, you mean how gold is not legal tender now?
What do legal tender laws have to do with gold? It can be used as money and in contracts legally. Or do you not understand what legal tender means?
ok dude, you know what, yes, everyone everywhere should buy nothing but golds because everything else is worthless in comparison to gold, nevermind that every critique of land holds true for gold also, plus you can't eat gold nor can you grow food on gold. No, land is a far worse investment than gold.
Don't miss my point, there are several farms in my family and they would be extremely useful in SHTF situation. But there are many dynamics in a SHTF situation that you have to allow for. One of the most important is that your land is immovable and will be illiquid, so if it is in the wrong place at the wrong time you are screwed. Sometimes in SHTF, you won't have 7-12 months to wait until next harvest. You need 250k+ to buy a farm, but only $170 to buy 1/10th ounce of gold.
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/convo ... for now