Imagine Spotify or Apple Music crossed with Charles Schwab or Robinhood, so you can press play to listen to a song, and then press “invest” to buy a share of that song’s royalty stream.That’s the vision of a merry band of “music stock market” platforms looking to lure loot from music-loving traders who want to speculate on the next big song, as an alternative to traditional stocks, bonds, or capricious cryptocurrencies. Some say it could end "artist poverty" and make investors rich, others say its not a terrific investment but lots of fun for fans. Will it be the next big buzz in the music biz?