Crypto collectables and traditional numismatic collectors are completely different markets (just like stamps and coins). There are a few that overlap (like me) but I think we are pretty few and far between. I don’t expect the traditional numismatic market to show any interest in crypto collectables for many years if at all. On the other hand the crypto collectable enthusiasts are getting more and more and so I suspect the casascius premium will continue to rise (at least in dollar equivalent terms)