The addition of currency does not mean that entire servers will suddenly adopt coins as a means of exchange. It may depend on the actual usage of the coins. Is their primary function to be a way to interact with NPC merchants? Will the precious metals be randomly rewarded from corpses and world chests, or will there be actual nodes to mine?
At a glance, the introduction of currency appears to be a welcome addition to the single-player game. It may give players a way to bolster their acquisition of thralls and materials, open content with NPC quest-givers, or purchase unique items that cannot be constructed through the Feat system.
In multiplayer, private or public, it will ultimately be up the server’s players to determine the value of the coins as vital means of exchange, or shiny baubles to admire and hoard.
Some servers may decide the coins are a great way to standardize the value of materials, others may simply consider them another commodity, like crystal or steelfire, to be traded as barter.