By "tangible value" I mean that it has some kind of function. If you buy property you can live there, rent it, etc. If you buy stock in a company you now own part of that company and technically get voting power.

Not every asset has to have tangible value, they can have purely financial value. I said you technically get voting power when you buy a stock because I don't think that's why most people buy stock. I buy because I believe in the company and I believe the value will increase.

I haven't seen much tangible value from NFTs and, as this article shows, they don't have much financial value either.