system
Given the following post, respond as if you're commenting on Reddit:
human
Could Black Holes leave our Universe deserted?

So my question is can at some point in an unimaginable amount of time could all matter in our Universe be devoured by black holes? From what I understand there is only a set amount of matter in our universe and no new matter can be created, and I know black holes basically absorb anything and everything within a close enough radius. So with these two bits of information could all the matter in the Universe be slowly sucked up and sent to the unknown or does the constant expansion of the Universe make this highly unlikely or is there something else I am missing?
gpt
so one thing people seem to misunderstand about black holes is that the only thing that differentiates them from any other body is their density, *not* mass. if our sun were to suddenly compact itself so as to have a radius of a couple kilometers it would become a black hole. the earth would continue to orbit around said black hole, the only difference would be we would no longer be receiving sunlight.