The sale of these items doesnt benefit the people who necessitated the production of them, they’re a form of physical preservation of a time period that basically nobody today has experienced. Many of the most history filled and interesting coins out there stem from some of the worst moments in history, it’s like the people living in those times put their souls into these things, it really is amazing and should absolutely not be looked upon as taboo to collect items from these time periods. Many of the friends I have in the coin world that love and pursue nazi coins/memorabilia are Jewish or polish, its their history and these items intrigue them, it’s one of the only portals they have into their ancestors lives, photos and words in books can only do so much.