[William Cloud Hicklin]

It would be plausible to think that the Dwarves also minted coins, at least in places where they had gold like Moria and Erebor. After all, in Of Dwarves and Men we find that the Dwarves relied entirely on local Men for their foodstuffs, as well as the military advantage of allied horsemen, and that implies having a medium of exchange.

It wouldn't even be beyond belief that the Shire-hobbits minted coins, probably in imitation of those of the vanished Kings of Arnor, since we know that they had and worked silver. After all, there seems to have been only limited trade between North and South by Frodo's time, the North Road having fallen into disuse; Saruman's purchases of pipe-weed seem to have been novel and exceptional. In the absence of trade, how would Gondorian coin have made it in any quantity up to the backwater beyond the Baranduin? (Note also that Bilbo was able to spend freely his loot from Smaug's hoard, and I doubt he went down to the butcher expecting to pay with a slice off an engraved goblet-so I suspect that much of it was in coin form).