Three years ago, most people had never heard of a non-fungible token or "NFT." Today, a one-minute clip of archived footage of Justice Ruth Bader Ginsburg's White House swearing-in ceremony is for sale for nearly $1,000 on CNN's website, and Tom Brady has launched an NFT platform company that sells digital replicas of sports memorabilia like his iconic 2000 NFL draft card. Seemingly overnight, and spurred by celebrity endorsements, NFTs have grown into a multi-billion dollar industry.