Not according to Gary Vee, he claims the tix stub of his flight from the US to Europe will be worth something one day. It won't. Sure, the memrabilia market is huge but it works just fine with current system it has, as it has for, literally, centuries. Adding blockchain to the process might be able to add an element of trust but who wants to bother with all the expense and trouble that comes with the blockchina when there's a current system that, honestly, works fine. This use case has been spoken about for what, ten years now, and blockchain collecting isn't even 1% of the memorabilia market. Darren Rovell shows off his tickets just about every day on Twitter and the current system to prove authenticity works just fine. For the buyers and the sellers. Blockchain has to bring something that can't be done by anything else before it will take off. Personally, I don't see it. The addition of an ongoing payment for some of these items, like Top Shots, is a nice addition but I don't know if that's the killer add to get everyone blockchaining memorabilia.