What does tangible value even mean? Something has value if someone somewhere is willing to pay for it. It's as simple as that.

Say you could buy an NFT for $1 that is currently valued on the market at $1000 (say, other similar NFTs from the same set have traded recently at that price). Would you not buy it because it has "no tangible value"? Or would you buy it and flip it to make $999. I know what I would do.

Good investments aren't about what you like or think have "value", it's about what other people like.