Not an NFT guy, but the "Ape Floor" (Cheapest price for a Bored Ape NFT) has remained remarkably stable (priced by ETH) since the craze died down, which has always surprised me:

https://www.coingecko.com/en/nft/bored-ape-yacht-club

I could be wrong but Id expect eth and nfts to have similar fluctuations, so this wouldn’t be surprising at all. What about compared to USD or another investment like spy

It does fluctuate, but the floor price is still miraculously $16k