4 Min Read (Reuters) - Non-fungible tokens (NFTs), a type of digital asset, have exploded in popularity this year, with NFT artworks selling for millions of dollars and musicians such as the Kings of Leon rock group embracing them for their latest album. FILE PHOTO: "EVERYDAYS: THE FIRST 5000 DAYS" is a collage, by a digital artist BEEPLE, that is on auction at Christie's, unknown location, in this undated handout obtained by Reuters. Christie's Images LTD. 2021/BEEPLE/Handout via REUTERS The trend is perplexing those who might wonder why so much money is being spent on items that only exist in digital form and can be viewed by anyone for free.