Will Lunar Silver Ml Become Numismatic?

I understand that the Lunar Silver Maple Leaf is a bullion, but what makes it numismatic?
I see some Lunars from the first serious that are going for a premium of a $100 over spot, and there's still so many people that they are willing to pay that amount , if not even more on ebay, to complete their sets.
I must admit that these are one of the most beautiful coins in my opinion.

so here's the question: if 30 years from now they are still collectible and people still chasing them as the premium at the same time goes higher, well they be considered as numismatics? what defines a coin to be titled as numismatic?
is it worth collecting them in your opinion?