What are your opinions about the world ending? Jw?

What you mentioned in your question is so out of our hands. Yes, the world could end and I personally believe it would be an act of God. But on the other hand the world has incredible regenerating powers and it would fight for it's own existence. If you believe in the Bible it does say that one day all the heavens and earth will be destroyed and a new one made. When? Can't tell you.