The universe will end (ironically) in the "Dark Age", where all matter has been replaced/consumed by black holes.
Why would the universe suddenly go to nothing without warning, I highly doubt that will happen. Even if it did, I would be sad but it's nothing to be afraid of. If you become nothing then you won't be able to worry about everything being gone.
Why would the universe end up consumed by black holes? Are you basing this off some science or just the idea that black holes pull everything towards them? If it's the latter, that theory doesn't hold up, because what we call "dark energy" appears to be accelerating galaxies away from each other.
Because I am a scientist
I find it interesting. A dimension is bigger than our universe.
Would a scientist respond like this?
I don't think a dimension has a sense of size.
"1 Then I saw a new heaven and a new earth, for the old heaven and the old earth had disappeared. And the sea was also gone. 2 And I saw the holy city, the new Jerusalem, coming down from God out of heaven like a bride beautifully dressed for her husband." Revelations chapter 21.That's what I believe will happen.
I don't care about life or death, because I am so damn insignificant. If I died right now, I've hardly affected anyone or anything at all.