Non-fungible tokens (NFTs) seem to have exploded out of the ether this year. From art and music to tacos and toilet paper, these digital assets are selling like 17th-century exotic Dutch tulips—some for millions of dollars. But are NFTs worth the money—or the hype? Some experts say they’re a bubble poised to pop, like the dotcom craze or Beanie Babies. Others believe NFTs are here to stay, and that they will change investing forever.What Is an NFT?An NFT is a digital asset that represents rea...