Pre-1965 "silver" dollar coins are 90% silver. At today's spot price they are worth $72.66 each, though typically to sell them you must take some discount, so you'd probably get like $65.
What has changed? The value of a dollar has fallen by that much in purchasing power.
Of course owning land free and clear and the other things you mentioned are important, though the bit about guns seems oddly paranoid or something to me. Sure, people do that, but I can't see how it might count among your retirement financials.
Silver is pretty speculative. It tends to fall to low prices and stay for a long period of time between spikes of high pricing. Gold tends to be more steady and stable, which is why nations and banks retain large amounts of it. Retirement advisors have been suggest that instead of holding 60% in stocks and 40% in bonds that people should start altering the ratio and added gold as a 3rd portion of investments. Some say 20%, some have said 40% in gold.
The world is changing as the post-WWII "Order" is replaced.
Here is a gold chart covering recent history:

Where is the lack of inflation protection here?
The chart is dollars per ounce by year. Gold isn't expanding, dollars are shrinking. Radically.