Came across this article re: top 10 collectible in demand for 2025.
No casino chips on the list, but sorta interesting - to see what others may collect ... a little of everything.

https://www.yahoo.com/lifestyle/10-antiques-collectibles-huge-demand-150500949.html

There are a couple of crossover connections with casinos: restaurant dinnerware can include logo'd items from casino restaurants. Also, Mahjong sets involve gambling/gaming, though no casino has had mahjong tables or tournaments that I'm aware of. The arcade jockey racers are kinda cool, IMO, but the antique collectible ones never saw the inside of the Circus Circus arcades.

Just a "NCR" article for you, if interested in such.