NFT's

< Blockchain
 * Wikipedia: https://en.wikipedia.org/wiki/Non-fungible_token

Introduction

 * A non-fungible token (NFT) is a unit of data on a digital ledger called a blockchain, where each NFT can represent a unique digital item, and thus they are not interchangeable. NFTs can represent digital files such as art, audio, videos, items in video games and other forms of creative work. While the digital files themselves are infinitely reproducible, the NFTs representing them are tracked on their underlying blockchains and provide buyers with proof of ownership. Blockchains such as Ethereum, and Flow each have their own token standards to define their use of NFTs.
 * NFT's are like a signed book.

Recent

 * Jack Dorsey (CEO of Twitter) sold the first tweet as an NFT for 2,9 million dollars.
 * https://www.theverge.com/2021/3/11/22325054/beeple-christies-nft-sale-cost-everydays-69-million