What is a 5 crown coin?

Could you please clarify what you mean by a "5 crown coin"? Are you referring to a specific type of coin that is denominated in crowns, or is it a generic term for a coin with a value of five crowns? If it's the latter, it's important to note that the value and denomination of coins can vary greatly depending on the country and currency in question. In some countries, a crown may be a unit of currency, but in others, it's not. For example, in the United Kingdom, the crown was a former unit of currency that was phased out in the early 20th century, and is no longer in use. However, in some other countries, such as Denmark, the krone (which is sometimes translated as "crown") is still the official currency. Assuming you're asking about a specific coin that is denominated in crowns, I would need more information about the country and currency in question to provide a more accurate answer. Without that information, it's difficult to say exactly what a "5 crown coin" is or what it's worth.