Why do some care so much about when and how the world will end? How did the world not "end" already in the past? For all we know Ragnarok passed and we're living in it's ashes. And it's not like the world ending or continuing will change the fact that we're gonna die someday, predicted or not.
The world's ending according to the Bible is not an end at all, but a new beginning. That is why we are all looking forward to it....we want what results from the end of all the horrible things going on in this world. It isn't the planet that will be destroyed, but the wicked humans responsible for all the rot....along with all those who condone the wrongdoing and who promote the worship of false gods, be they human or otherwise.
Why is that so important? Because of what it means for the earth itself and all living things upon it. It not only means the end of all wickedness, but the return to one true mode of worship, and the end of all false worship. It means that every human living will exalt the one true God and Creator of all. Belief in false gods will be eliminated.
It means the end of sickness, suffering and even death itself.
Imagine returning to the conditions that the first humans enjoyed in Eden?....along with the prospect that a wonderful life in that place will never end. How can we not be excited about that?
Whilst so many concentrate on getting themselves into heaven one way or another...the promise held out to the majority of mankind is a return of life in the paradise we all lost at the beginning...right here on earth.
Honestly why worry so much about the world ending questions in the first place?
The only ones who need to worry are those whose lives are out of sync with the commands of the Creator through the teachings of his son.