How to explain this “NFT” thing we’re all hearing about in the news? OK, so … if you buy a unique ID number associated with a certain piece of art, then no one else – in theory – can buy that exact art again. “If I sell Picasso.jpeg to James, I can’t then turn around and sell the same Picasso.jpeg (or an exact digital replica of it) to Robin – the blockchain knows that I already transferred the art (and its NFT) to James, so I can’t sell it to Robin, and will mark the transaction as invalid.” Totally clear. – The Guardian (UK)