It's not just a picture, it's minted on the blockchain, becoming a Token, that has value in the metaverse, you are selling the rights to own the tokenized version of the art. The buyer owns it, and can sell it, but have no commercial rights to it. Now the original image is yours, unless you want to sweeten the deal and add it in the sale, possessing via delivery. Others may have a very large version of the none NFT image, and have a link to it which unlocks at purchase of the NFT version, giving the buyer the NFT and original artwork.
Now to get the image minted on the blockchain, there's a "GAS" fee, they used to be cheap, but now depending on the time of day can get between $80 and $160 in ETH, now getting ETH you get charged a fee there too, like 5 - 10 bucks.
So getting an image tokenized on the Ethereum blockchain - metaverse, can get pricey, and one now needs to sell the art for 200 bucks and up to make something. Before Beeple's 69 million sale, it cost 6 bucks to NFT art.
