High old Numismatic value coins are sold mostly through auction houses such as Heritage and Sotheby's, those collectors prefer government issue coins. These collectable crypto's have a numismatic value as well but the market demand is far less than the well established generations of coin collectors.  I think eventually ( 20 yrs IMO) these collectables will carve out a niche for a new generation of investors/collectors. The demand is at a 30 year low and peaked around 1991.