I don't do this NFT stuff, neither selling or buying. But if you want to get into better quality creations, you could do it yourself: first of all, follow my invitation for Nightcafe: CREATE AI IMAGES WITH NIGHTCAFE - once you are on there see what you can create (test out the free version first, but Pro is very affordable with many more perks). One of the models available lets you animate your creation. But I got a better way, namely I am on Deep Dream, and for 40 credits you can create short videos by uploading up to 4 input images, and Deep Dream turns them into a short 7 second video. Want to know what this could look like, here is one of my videos: MONSTER IN DISGUISE. I looped several of those videos together with Microsoft Clipchamp and published them on YouTube, here is one example:

How about Music? On that above video I added music I created on a site called SUNO - check it out, this is my chanel on Suno OTTO RAPP ON SUNO MUSIC AI

BTW: Nightcafe also has a feature where you can link your creations to your NFT account. Like I said, I am not into that - but I do sell some of my better AI images in my print shop (for fiat money, lol), a separate category: OTTO RAPP - PIXELS PRINT SHOP - AI CREATIONS