Well, if you're compliant in the US right now, you are keeping track of the value of every coin anyway. My own experience is that not many companies are doing t

Well, if you're compliant in the US right now, you are keeping track of the value of every coin anyway. My own experience is that not many companies are doing this -- at CoinLab it was a very large effort, and included head-scratching conversations with accountants as to whether or not specific identification vs FIFO/LIFO was most appropriate. So, yes, pain in the ass, however, one that you incur whenever you spend coins if you're compliant.