In the example you've described the NBA is really just replacing the old form of collectable basketball cards with NFTs.
So as some basketball cards can be limited edition and can bring huge money so to will this new form of collectables.
Which actually makes proof of ownership far easier when...
Except that they are developing technology now where an image will be able to be coded with identification so as to be able to identify it as the original or the fake.
Which means in the future it will become no different to how people or companies own an image or footage of something and any...
No different to any class of collectables.
Stamps, Coins, Sporting Cards.
NFTs fall into the same category. Just in this case you don't use cash to buy something you use a cryptocurrency.
When stamps values go down does anyone man about it not being regulated?