They could even bring casino chip collecting to a whole new audience. Who's minting...?
https://opensea.io/collection/pokerhashchips

I watched this today... pretty good overview of Crypto/Blockchain and NFT's...
https://www.youtube.com/watch?v=uQ54n8_WS7c

On a serious note... it would make sense to mint rare chips to the blockchain. So if someone buys or sells a chip there is a history of its ownership and the price that was paid for it.