My hunch is, it's the inside of a giant black hole and expansion we perceive is new matter falling into that void. The start of our universe is just when the outside thing collapsed into a black hole. So it's probably recursions all the way up.

I could never wrap my mind around "point-like" entities, like BHs supposed to be, and after all before BH collapse we have something like neutron stars.. extremely dense matter, kind of a perfect crystal ball made of a strange kind of matter.

So in my view BHs are just that, except you have that informational isolation layer (EH) that allows this giant crystal computer to crunch its quantum computations ad infinitum, simulating an endless array of possible universes.

Mind-boggling.. I'm in awe.