B What are the potential causes of the universe's eventual demise?

[frost_zero]

Are there any other ways for the entire universe to die other than freeze death, big crunch, vacuum decay and big rip?

 

[jedishrfu]

This article on Wikipedia discusses it pretty well with respect to the universe reaching a thermodynamic equilibrium where no further work is possible.

https://en.wikipedia.org/wiki/Heat_death_of_the_universe?wprov=sfti1