In case you haven't heard yet, the Mary hardfork allowed for native tokens on the Cardano Blockchain which has opened up NFTs on Cardano.
There are already NFTs that have been minted and are being traded such as Spacebudz that released about 2 weeks ago. But there are many more in the works and that have already been minted! Cool part about NFTs is that each one is completely unique, so you are the only one that owns it!
Check out the first Cardano NFTs, Spacebudz, in the link!