[53toppscollector]

I don't collect modern cards at all, but I think its unlikely there is a sport out there that people are not paying any attention to that will one day show massive price jumps. A few years ago, I think Formula 1 had a moment where a bunch of rarer stuff really skyrocketed in price. Tennis cards seem to have a very limited (and capped?) market. Cricket doesn't seem to have much collector appeal. Auto racing beyond F1? No. Lacrosse? no. Pickleball? god I hope not.

The only sport I can see making big gains is Footy, but even the popularity of that sport has only slowly increased in the US over the last 20 years. It seems to be gaining more steam, but the interesting thing about that timing is 2 of the greatest players to ever play the sport are just about at the end of their careers, and its tough to see what the next generation is going to look like.