Forgot “Glorified Pump-&-Dump scheme” (NFT’s)
NFTs are basically Bitcoin and fall under fake money for criminals.
Stamp collecting for criminals
Nah it’s worse. Bitcoin actually has legitimate uses. (Yes, they are a minority of actual usage, but they exist.) NFTs are only useful for speculation, gambling and money laundering.

Bitcoin actually has legitimate uses

Ransomware.

Bitcoin’s only legitimate use cases are a worse, slower and more expensive eletronic money transfer. In other words, there aren’t any.
“Expensive cartoon monkey pictures”