I'm sorry if what I say is complete nonsense as I I don't know too much about sience, but if everything that begins and everything that is ends eventually, has it really ever existed? There's no time to go back in, there's nothing left of existence. So there isn't anything it could have been into.
This also gave me another thought, as everything that can be will be. What if time was actually a loop?. I mean what if when everything that could be has been and instead of existence of everything just ceasing to be, it all begins again.
I'm not good at putting my thoughts into words and my english isn't too good but I hope you still can understand what I'm trying to say with this crazy "trying to sound clever" nonsense.