What nickel is worth millions?

I'm intrigued by the statement "What nickel is worth millions?" It immediately sparks curiosity about the unique value and significance of this particular nickel. Could it be a rare coin from a limited mintage, perhaps one with an exceptional historical or numismatic value? Or is it a metaphorical reference to a digital asset, like a unique NFT or cryptocurrency token, that holds immense monetary worth? In either case, I'm eager to understand the backstory behind this nickel and how it came to acquire such a staggering valuation. What factors contribute to its worth? Are there any special characteristics or qualities that set it apart from other, seemingly ordinary nickels? I'm looking forward to delving into the details and gaining a deeper understanding of this intriguing question.