there seems to be 1 huge problem , everything would need to reverse direction in order to head back to the center.

however there isnt anything that could accomplish that.

unless the universe is inside a area that has a pressure and the big bang pushed against it.

then perhaps that pressurized area could eventually push everything back.

or a huge vacuum was created when the big bang occurred and eventually the vacuum would pull everything back.

Im really not concerned with it , I was just trying to see if there was a way that it could happen , thats all.

and I'll leave that type of thing up to you guys.

theres another huge problem also.

a rock cannot create another rock.
atoms dont create atoms.
gasses dont multiply.

all the scientist on earth cannot create a grain of sand.

or a simple hydrogen atom.
3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.