i wouldn't call it key because although what you are saying is going to be great if it happens but it is still going to target a very small group of people whoa are actually buying tickets. how many people can actually go to an stadium and watch the matches anyways?

interestingly enough we will see this in action during the 2020 Olympics which is held  in Japan..............
Yes to my well able hero comment,but at least ,most countries international sports are sponsored by their government's,so them getting to know about Crypto currency, can make them create their own digital currency,and possibly legalized Crypto,being it,its the only or a major means of participation