I’m not certain about the history of this particular person, but there’s a military tradition built around carrying a pfennig.
from https://www.wearethemighty.com/mighty-history/military-challenge-coin-origins :
Another lower enlisted tradition began in post-WWII Germany as assigned U.S. troops would carry West German money with them. The exchange rate was so bad that the One Pfennig coin was hardly worth a fraction of a penny and had nearly zero value to American troops. So, only the poorest of the poor would bother saving them — until troops gathered to drink. If someone would shout, “Pfennig check!” everyone would empty their pockets to see who was poor (if you had the near-worthless coin) and who wasn’t (if you were above keeping them). If you were “rich” enough to not need to carry a worthless coin, you were rich enough to buy your brother-in-arms a drink.
It’ll die when it’s not getting the ratings to carry on anymore. Stop watching and it’ll stop being made.