Coin collectors are specially interested in the coinage system and the coin production during these times. This acts as one of the reasons why people remain highly interested in everything that was going on during those time. The fascination is remaining at the highest since the events of the World War II are still in our recent history, and regardless of whether we notice or not, we still suffer, or rather live in the aftermath of those events.
The first half of the 20th century was one of the most fascinating, yet terrifying times in the human history.