Well, of course. Long-distance trade was well established already in the Stone Age. I was just talking about the means of transactions, which are often quite important.
Coinage is kinda funny because those royal profiles and suchlike actually improve its value beyond its base metal content. Isn't the idea the minting acts as a sort of "proof of quality" of the coins, a quarantee they're of at least minimum content of gold or whatever and not too badly debased with other metals ? Paper money moves to the field of pure symbolical value already, but let's not go into that.
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