What is the most expensive non-precious metal coin?
In the realm of numismatics and cryptocurrency, we often encounter coins and tokens of various materials and values. But I'm curious, what stands as the most expensive non-precious metal coin? Could it be a rare platinum coin, a uniquely crafted palladium piece, or perhaps a highly sought-after titanium token? The quest for the answer begs to know not just the material, but the rarity, historical significance, and possibly the story behind its creation and preservation. Surely, such a coin must command a significant price tag, and I'm eager to learn more about this enigmatic piece of monetary history.