If you asked a traditional sports card collector a few years ago if a blockchain-based digital sports card would be successful, they would have probably laughed in your face. They might say, “Who would want to buy a digital sports card? Why would anyone want a digital collectible in the first place?” They would have talked about the history of the cards, the physicality of owning a verifiably rare piece, and so on, and at the time, they would have been correct. Sports card companies like Pani...