Well, this detail is going to be included since a character gets paid a ton of money in the first chapter...
But is he really going to make change? Edited to add: "You killed my greatest rival! Here are riches beyond your wildest dreams! Oh, but I need 1.75 whiffles back for my cab fare. And another .43 for the coffee I just bought you." Edited again to add: And why did you create a second thread on exactly the same topic?
He's going to deliver what he's promised. And also because the first one was specific to stones and whether or not I should use them. I was losing confidence in them, so I created a new thread asking what I should use for currency (if not stones.) Then I decided to use stones again. Problem solved.
In terms of how they carry it, at one time rich men used to wear a goodly proportion of their wealth as torcs, bracelets, rings and so forth - given that dragons have long necks, torcs set with precious stones could be a sensible way of carrying wealth
