This is an answer I gave to this question 3 years ago:
"That depends on what you mean by "end". One day, billions of years in the future, our sun will become a red giant and our current orbit will actually place the earth inside the sun. Will that be the end?
It is possible that still further billions of years in the future our solar system will end up crushed into nothingness in the black hole at the centre of our galaxy. Is that the end you are thinking of?
Or do you mean the next natural disaster, like an asteroid or comet hitting the earth, causing a global extinction event, like the one that put an end to the dinosaurs? Is that the sort of end you mean?
Or, will man's stupidity cause an environmental disaster, thus putting an end to all human life on the planet? How about that for an end?
Lots of possible ends and much cleverer people than me** cannot answer your question."
It's still valid.
** Believe it or not, there are some.