As individual bits of matter then each must become something else but as the universe is more a concept covering the idea of a container I don't think that it really can end. Should it die with the end of that concept, of universe, then maybe but the overarching actuality of a universe has to go on in existence if not in concept and if it must die then I think philosophically that's a reason that and balanced scientist must take to begin to explore creator ideology because the universe then begins to become a tool.