Will humans become extinct

It's complicated, but to be honest, it's likely to happen.

Humans are a very advanced species, and have a basic method of survival. They can survive in tough environments all over the world. So for the entire human race to be wiped out there is one man-made theory, in which the whole world would get into a nuclear conflict and everyone successfully blow each other up.

There are two other theories, in which 1) A bolide-fireball-missile meteoroid (a very large impactor) can hit the Earth and extreme volcanism can happen, and 2) a very catastrophic climate change.

just hope this doesn't scare you too much