So that means that we die?

??
If you want to, me personally, I'll be continuing my life and enjoying it, rather than perpetuating needless fear. I don't fear death, but I know I sure won't go down so easily as by any kind of apocollypse, haha.
The idea of the world as we know it could be put to an end rather quickly, and happens all the time. Look now, we went from a nation of slave owners to electing a black president, lol. Or it could be as simple as something like a new scientific discovery that completely changes our general understanding of physics or biology or something.

The world as we know it is gone and now we have a new, because new realities are created all the time.