I would use the analogy of food to say we continue to buy food. It is almost like we can't get enough of it each day, we keep coming back for more.
Likewise, we keep on coming back for more art, music, and a wide varieties of things regardless of how scarce it might be.
I don't know a lot about NFTs but I love cryptocurrencies, blockchain technology, Bit Torrent, etc.
Steem (Steemit), Hive Blog, and similar blockchains have had 7-day payouts generally for posts which is good.
Lino's Dlive, which was formally on Steem before it was on Lino, might have been the ones talking about having Evergreen Content as opposed to just 7-days payout periods, have a post able to collect rewards or tips or upvotes ongoing beyond just 7 days. I don't remember if Lino ever did that or not.
Maybe it was not Lino and maybe it was a different blockchain. In general, there is value in the tug-a-war between buyers and sellers in free markets, blockchain is mechanism for helping with some of that, risk is involved, some people may do better, some not as well, but that is the beauty of life.