Yes, but how many handfuls of 0.22 can you carry or store safely? If you're looking at protecting several hundred dollars of wealth, ammo is the way to go. If you're looking at protecting several hundred thousand dollars of wealth, you've already got plenty of ammo, now you're looking at something with a decent value to weight ratio, and that's gold.
“...now you’re looking at something with a decent value to weight ratio, and that’s gold.”
Lots of things can be used for bartering (ammo, junk silver, coffee, booze, talents) to get by on. The gold is more of a long-term thing, once things get better.
Or, more realistically, when stocks go bad (but not a total collapse of the economy), you have gold to offset some of those losses.
10s of thousands fit in a few cubic feet.