If you buy the Marilyn Monroe print then you can legally put it up on your wall at home and other people can see it.
If you buy an NFT (which is just an URL to somewhere that might have a picture today but might be a 404 tomorrow or an ipfs hash if you're lucky) then you can not (in most cases I've seen) legally put that picture that's behind the link in the NFT up on your website and show it to others. Heck, in some countries this doesn't even grant you the right to store that picture itself on your own computer.
(Most) NFT's don't give the owner of the NFT any rights for the linked art itself - you can't copy it, distribute it, present it etc. You can do all of that with the NFT but _not_ the actual art piece.
If you buy an NFT (which is just an URL to somewhere that might have a picture today but might be a 404 tomorrow or an ipfs hash if you're lucky) then you can not (in most cases I've seen) legally put that picture that's behind the link in the NFT up on your website and show it to others. Heck, in some countries this doesn't even grant you the right to store that picture itself on your own computer.
(Most) NFT's don't give the owner of the NFT any rights for the linked art itself - you can't copy it, distribute it, present it etc. You can do all of that with the NFT but _not_ the actual art piece.