For this post, I am only going to talk about the secular and not the religious definition of infinite.
I used to believe existence was infinite being a proponent for the collapsing universe theory (aka a never ending succession of universes....starts with a big bang and then collapses back into the same space prior to the big bang to start the process all over again), new findings point to the impact of dark energy as pointing to the eventual death of the universe....aka dark energy will even push atoms apart. So yes, it will still be existence, there will still be a universe, but it will be a universe of almost nothingness.....no substance, just loose subatomic particles floating in the nothingness of space....well not even space as space has substance...you said it can't be nothingness if we are expanding, but it would be essentially nothingness like smoke after it has dissipated into the atmosphere....particulates are still in the air, but they have become so disperse that they are essentially no existent.
I used to believe existence was infinite being a proponent for the collapsing universe theory (aka a never ending succession of universes....starts with a big bang and then collapses back into the same space prior to the big bang to start the process all over again), new findings point to the impact of dark energy as pointing to the eventual death of the universe....aka dark energy will even push atoms apart. So yes, it will still be existence, there will still be a universe, but it will be a universe of almost nothingness.....no substance, just loose subatomic particles floating in the nothingness of space....well not even space as space has substance...you said it can't be nothingness if we are expanding, but it would be essentially nothingness like smoke after it has dissipated into the atmosphere....particulates are still in the air, but they have become so disperse that they are essentially no existent.
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, purifies us from all sin.