This website uses cookies for functionality, analytics and advertising purposes as described in our Privacy Policy. If you agree to our use of cookies, please continue to use our site.
They are collectible elements within the Ethereum blockchain under ERC-721, where each token refers to a single element with a certain value. They represent something unique and therefore does not have the mutual interchangeable value. In other words, no non-fungible token is the same. The most popular is CryptoKitties, but there are many others.
A term made popular by Carlos Matos who was the spokesperson for the Bitconnect Ponzi. He used it frequently during Bitconnect events to rile up the crowd.