I understand the premise of NFT, mainly because I’ve bought virtual goods in games and those virtual goods are controlled by a central organisation which maintained the value.
The bit I don’t understand is, what is to stop person A setting put their own blockchain A and offering a Monet painting image for sale as a NFT. Then along comes person B who decides to set up their own blockchain B and offering the same Monet painting image. Two people would then own the same thing and it’s no longer unique to one person. A Monet was just used as the example, but could be a tweet or whatever people are selling as NFT’s.
It’s pointless in my eyes unless there is a central database blockchain which defeats the purpose of blockchain technology .