What coin was sold for $4 million?

Could you please elaborate on the specific context of this question? Are you referring to a recent auction or sale of a rare coin, or is it related to a cryptocurrency transaction? In the realm of cryptocurrencies, sales for millions of dollars are not uncommon for popular and highly valued tokens. However, to provide an accurate answer, I would need more information about the sale itself, such as the date, the platform where it took place, and any notable details about the transaction. Assuming it's about a cryptocurrency sale, it's worth noting that prices can fluctuate significantly over time, and a coin that was sold for $4 million on one day might not retain that same value the next. Furthermore, the market for cryptocurrencies is constantly evolving, with new tokens and projects emerging regularly. So, in summary, the question "What coin was sold for $4 million?" cannot be definitively answered without additional context. However, if we're speaking in general terms, it's certainly possible that a popular or rare cryptocurrency was sold for such a high amount.