they say the universe eventually will reach max entropy and then nothing will happen anymore cause no more differential in energy potential...
But what will happen to black holes? To reach max entropy, there can't be black holes else there would be potential differences in terms of gravity and stuff.
So what will happen to black holes before max entropy?

@daughterofrao black holes aren't permanent, they lose energy over time via Hawking radiation

@noiob how can that radiation cross the event horizon from inside the event horizon?

@daughterofrao it doesn't, it's created outside of the event horizon by matter/antimatter fields collapsing (or sth like that)

@daughterofrao the energy that creates the radiation comes from the black hole, which is why it's slowly losing mass

or so Hawking theorized, it's a bit hard to check