Eternity is a concept which is hard to grasp for us humans, as we have nothing in our lives to relate it to. Fully understanding eternity would be like imagining a colour which doesn’t exist; impossible for us humans.
Everything in human life has a beginning and an end, very simply because we begin and end. I do not believe there is anything out there which doesn’t have some kind of beginning and end, and that’s mostly because I can’t fully understand the concept, only the existence of it.
One can of course argue that a circle doesn’t have a beginning nor an end, but that is relative to how one looks at the circle. A circle can only occupy a certain amount of space, ergo it has a beginning and an end (from one side to the other)
So yes, I believe everything has a beginning and an end, but this is merely because of my human ignorance concerning eternity. I/We can’t help it.
In the end I won’t be around to find out anyhow.
(That's more of a philosophical tale to the subject)
Our boy Steph Hawking.