But is it like collector gold coins -- those sell for a premium over their intrinsic gold for numismatic value .

I suspect there people who are betting they can arbitrage them, such as getting an allotment of them and renting them out. (I'm not talking about the scale of a single card in your house, but in DC operators or those who have racks leased already)

And "business.com" sold for $7m in 1999... Stupidly inflated "assets" aren't a proof but if anything they prove the opposite of your point

You're comparing a putative leading indicator to what's almost certainly a trailing indicator.

Don't understand this, they're totally outclassed by datacenter tier cards so is it just hobbyists driving these prices?