Some people like to use the input coin value function to manage the value of their coins and their collection. However, some coins are only worth their exchange value, meaning that as the exchange rate fluctuates, coin collection values change. As a result, I propose that there is an option to select exchange value or melt value for a coin's value.
I know very little about a coin's formal value and sometimes can only find limited information online. If a collector could specify an exchange value, I could more easily offer a comparable trade.