I've been trying to figure it out the past two years or so. Easily recognizable and verifiable silver coins and bullion always have a value based on what they are worth for their silver content.
What it takes time to sort through is all of the cons out there. I don't want to purchase coins with much subjective value based on their rarity. If I buy a coin, it's because it's interesting to me. In a crisis, they'd probably end up being sold for their silver content.
Pennies before 1982 have much higher copper content.
Other coins have varying amount of silver.
Regardless, coins are metal and have some value as that.
OTOH, brass may become a sellers market.
That might be worth much more than silver.
Brass, the new precious metal.
I believe a Uncirculated Morgan Silver Dollar will always be worth more than it’s silver content.
If you are concerned about a crash, stocking up on bullets, beans, canned goods, water filters, gasoline - those things are invaluable and are worth something to nearly everyone.
Back in the early '70s I knew a guy who ran a gas station during the Depression. He broke out a coffee can of old coins that dated back to the 1870s. He said that people used them to pay for their gas.