Your last sentence is one of your more profound. I'm not going deep into the weeds but:
Americans are not accustomed to trading in gold. It will be difficult for a person with an oz of gold to convince an average farmer to trade him a cow. But if that person changes the oz of gold into dollars the trade can be made. This is why gold, as a barter/currency medium will be problematic at best. Only a infinitesimal number of Americans have ever seen a gold coin in circulation as currency. Gold dealers advertise and sell gold as an investment, the certification of the amount and purity of the piece being the strike/face/appearance, like a quarter looks like a quarter and everyone knows what a quarter looks like. Gold dealers also sell rare coins so ........
Imagine you have an oz of gold and a "1897-W, $50 gold eagle, MS63" (I made that up to make a point, no clue of its "value" or existence). How do you convince the farmer you would give him this oz of gold for one cow but you want 4 cows for this other oz of gold. The "value" of an oz of gold can be looked up on your hand held information device. But the 1897 coin has additional collector "value", one gold cow and three collector cows. If it gets scratched then it's worth only one gold cow and only two collector cows. Now negotiation becomes somewhat more spirited. And any change returned from your oz gets complicated.
Your earlier comments about gold as more of a hedge than an investment/currency ring true. Goldbacks will prove an interesting experiment but I hold little hope for acceptance. I do plan to buy some to frame for the wall. Americans are not a culture ready to trade in gold and, "see last sentence in quoted post".
Should you venture south, call and I'll buy lunch. We could even discuss the pros and cons of a 6011 root and LoHy fill and cap but you would quickly exhaust my knowledge.
Thank you,
MrSmith