imagine spending tens of thousands of dollars on a link to a jpeg of an incredibly ugly monkey, and then apparently the amount of electricity used to generate that monkey is more than a household uses in a year (this part people argue about nonstop)
that's nfts in a nutshell
pretty much just a get rich quick scheme that relies on people continuing to buy in. It has no real artistic value and the inventor of the technology behind it even called it a scam because you can't actually store images on the blockchain.