I think about this a lot. Perhaps too much. https://web.archive.org/web/20171216072414/http://squid314.livejournal.com/332946.html
For a White Elephant or Secret Santa gift exchange with a limit of (say) ¥4,000, is 4000 × 1¥ coins the best gift or the worst gift? 🤔
Before you answer, remember https://www.pbs.org/newshour/economy/the-economics-of-wasteful-spending-the-dead-weight-loss-of-christmas