The artist Grimes recently sold a bunch of NFTs for nearly $6 million. An NFT of LeBron James making a historic dunk for the Lakers garnered more than $200,000. The band Kings of Leon is releasing its new album in the form of an NFT. At the auction house Christie's, bids on an NFT by the artist Beeple are already reaching into the millions. And on Friday, Twitter CEO Jack Dorsey listed his first-ever tweet as an NFT.Digital artist Beeple posted a new work of art online every single day f...