NFT tech is there and it's great but it’s misused if you ask me. Images that you own is not really a great idea, the whole mocking around it about "I could take a screenshot of it" is of course not fully understanding the idea behind it, but also makes sense for us to see what others are thinking. If we could get the NFT technology to be used a lot better than we would have a better chance to make it go higher.
Rollbit is a good feature because of this, they created rollbot with the sole understanding that it would be connected to the casino, meaning it’s not just some images, it actually has a purpose and that is why it was such a loved idea and bought so much.
What about cryptos? Bitcoin. Do you think it's not misused? I guess it is. Not that people use it as an asset instead of a currency but criminals are using it for their activities. Same goes with nft's because we have reports that it's being used to launder money.
The one that you are talking about, selling your own pictures as a form of nft is actually allowed and normal. Same with those arts nft. Don't forget that nft's have different branches, not only gaming/gambling. Sure you can take a screenshot of those nft pictures but you still didn't have a proof that you own them. Rollbit is already a great casino even before they add nft's but it seems they are benefiting from it.