As soon as a hacker is able to steal the file, the market will be flooded with fakes...or a whole lot of originals.
No, there is only a unique version, verifiable by public key cryptography.
Art is how wealthy people launder money . That’s why you see these huge prices paid.
I don't think so. I think the fact that the image file can be authenticated as being the original is the main reason it is worth so much to a few collectors. The image itself is secondary. But I could be wrong.