Holy shit. Go big or go home. This will be an epic tracker.

As a noob (and from personal experience), one that stands out to me as difficult would be lealana coins. There doesnt seem to be public lists posted anywhere for the BTC coins, the addresses of each coin are just passed from seller to buyer.

This will be a great reference for collectors if/when you complete it. Good idea and good luck guys, I look forward to using the final result.