It's not really known yet if the universe will continue to expand to a cold death, or contract back to a big crunch.
It's not something the laws of thermodynamics can tell us.
Many things are not as simple as you like to pretend they are.
One thing is for sure, you and i will be long dead before that happens. The rest of the human race will also be either long dead or completely unrecognisable.
I'm concerned with the things that will happen in my lifetime, and the lifetimes of those I love.