this is making the key assumption that the number of people that exist in the future is the same as the number of people that lived up until now, which seems unlikely. A bigger issue Id think is that if the universe ends (or really just the world, the universe is overkill), then all those time travelers from the future never can exist to do this in the first place, making this a classic time paradox.

[–] [email protected] 4 points 1 day ago (1 children)

I think it still works. If you increase the number of humans by 6 orders of magnitude, it still seems unlikely to form a black hole big enough to be an issue

[–] gibmiser 4 points 1 day ago* (last edited 1 day ago) (1 children)

Humans? How arrogant of you (<3) to assume that only humans exist and only they have access to time travel.

Add aliens (and artificial lifeforms) to the mix and watch the universe implode!

[–] [email protected] 3 points 22 hours ago

Plus the mass of time travel devices.