Private ownership is not determined by a piece of paper or computer code. It's determined by who has the physical might to enforce contracts through police or military. People are so capitalist-pilled that they think private property is magical. Unless the government gets involved and decides to start arresting people who screenshot NFTs, they will always be worthless. But the moment that happens, NFTs will still be worthless as the entire point of NFTs is to create an independent system of private ownership without state or government intervention. It doesn't matter if you have proof of a legitimate claim to ownership on something. Your claim is only as legitimate as your ability to stop others from stealing from you.