The thing is that it is not very easy to sell your arts, so I wonder how those people managed to sell stealing art-works. Actually, there must be an interesting story behind this NFT, a famous author etc, so I don't really think that people who steal these pictures, earn anything.
I don't see any value in NFTs as art, but I do believe that they will be widely used in the future as proof of entitlement.
The theft is also just a copy and for true collectors, a copy will have absolutely no artistic or collectible value and collectors would certainly prefer to relate more to the original version, a work that comes from the author's own hands, not the hands of a thief, I don't understand why there are artists who are not confident in the original version and worry that what they create will be copied on the NFT space. NFT is just a name created to enhance value and make money, compare to actual art paintings, it's two false stories, buyers on NFT are just investors while buyers on art value are collectors, need to distinguish