Adam the Waster
Hunter
Money printerNot necessarily. I'd often run into this in Fallout New Vegas, and would offset the issue of the trader not having enough caps by also buying things I did needed as well as selling what I had.
Realistically, it would make sense for the traders to have a limited amount of Dukes (refreshing when the store stock changes every few days), as I doubt they'd just have an unlimited amount of currency on hand.
But it would solve issues like near infinite money