No one is talking about assigning copyright. The question is about a license to display the content on a website. I am fairly certain you have heard of non-verbal contracts before. For example, here is what the UK government has to say about an implied copyright license:
Anyone can also sell a signature of Clooney. And yet no one does, nor would anyone buy it. This is not something that plays into a serious analysis of the NFT space, and so I am not sure why you would want to find it interesting to talk about.
No. Copyright must be explicitly assigned.
> Also, consider that in NFTs, the only one selling an NFT to the Mona Lisa is Leonardo.
Nah anyone can do it any time.