The fact that NFTs can work on bitcoin, but haven't shows me that Solana, Ethereum etc. are pure hype. I don't want to own anything from such chains, but I would be interested on purchasing the rights of a Yu-Gi-Oh card by Konami, say for instance, if they were working on bitcoin instead.
if person A owns the nft for some jpeg on ethereum and person B owns the nft for the same jpeg on some other blockchain then is that a problem? it seems like it would have a devaluing affect on the original image. or maybe we're back in the .com days where you had to register .net,.org, etc just so no one else could problem is with this stuff there's no icann to oversee abuse.
The solution to the above problem is not technical, as it not technically possible to prevent someone from selling the same asset on two blockchains. The solution is legal, and is something that would need to be handled by the courts.