Two signs of market maturation:
1. Set Collectors emerge
2. Spot + Premium sales emerge where Spot = 0.

 Years ago the statement was - who on Earth would pay more than $1000 for - insert random crypto collectible with premium, collectible value only.
 Now we have specimens selling for $40,000, and only 2000 of that can be attributed to the spot value of gold.
 From the people I have spoken with, my understanding is that these are being snapped up quickly.