What does the crystal represent in the new Naruto Op (ep 432)
After watching the opening, here's my version :


  It's all about the collective hopes and dreams people have for one
  another and themselves. All of the dead characters passed down the
  circular stone that represented the hopes they had for Naruto, who
  embodied the future. Naruto struggled to achieve the goal by
  struggling no matter how tired he was. Or this crystal can also be the past, that's why Sasuke would want to destroy it (but later, he accepts it).