If the Universe will eventually "die" (It Will) why does it exist?

The Universe, in its current state will eventually cease to exist we know that. Rather it be a heat death, a Big Freeze, a Big Crunch etc it doesn't matter doesn't matter itself decoys over time and eventually the Universe will be empty and completely void, or cease existing all together. This however flies in the face of logic. Natures goal is to exist. Thats all nature does. The Universe has its own set of rules and whatnot to assure its existence. If at the end of the day, one day it won't exist, whats the point of existing in the first place? I know this question can't really be answered, but I'm curious as to your opinions..