If the US dollar ever failed and the hooey hit the fan the only valuable things would be bullets, seeds and food... No one will be looking for silver coins imo.
If SHTF, This angle has validity...I believe that jewelry would be better trade items than coins..especially for getting from 'point A to B'.....Wanna do a test? Take a silver dollar or half and show it to the average person on the street nowadays...they will not have any inkling what its worth and dont really care....
Then, pull out a ring, a decent looking one, doesnt even have to be gold, it could be Tungsten or SS, or Cobalt...they will give you $20+ for it. long...Ashamed to say I sold a tungsten one for $60...
Just look around, observe the kind of people we are dealing with nowadays, what do they consider 'valuable'?....You can carry a lot of rings on your person, you could trade them all day long for a tank of gas...easier to carry and travel with than coins, trade for way over melt, in the case of junk 1000x metal value...Pretty little Silver rings? Yeah...easy 10x melt...
Its hard to get melt for a gold one...Sure, a little 2gr 10K you might be able to get $40 for, but a decent 8gr 14k? People are just not carrying around a couple hundred in cash anymore, so its the $20-40 range a fellow has to focus on for fast offloads in a trade/cash...
SHTF? Try crossing a border with a load of coins...easier to do with a bunch of rings and necklaces and bracelets...various sizes and corresponding 'values' make it simple to do a trade for fractional items...
Do a local test, its fun! The little gas station counter staff that knows me are always interested in seeing what jewelry "do I have in my pocketses" ...they dont give one diddly damn about a Walker half...but they will buy a nice little silver or junk metal ring...and be happy about it!
The only people that are interested in coins is US...and we are few...