If all the matter in the universe was once in a singularity which expanded with the Big Bang to the size it is now, then surely the density of matter initially exceeded the threshhold to create a black hole.

If such is the case, then don't we all live within one massive black hole and the physics that we see are the physics that operate within a black hole?

And if there are smaller blackholes within our observable universe, then surely it is reasonable to assume that there is physics that operates within those blackholes that is similar to our own.

This leads me to think of 2 pretty cool outcomes.

1) there can be an infinite number of blackholes within blackholes and that our observable universe exists as a just one blackhole in a universe of a larger scale just as we have many black holes within our observable universe.  Kind of like infitie Russian Dolls.

and

2) it is possible that the observable universe can both expand to reach the scale and density equilibrium required to one day equalize with the space it occupies in the next higher up scale universe.  Balance could be achieved through the mechanism of matter falling into the Black Hole and hawking radiation out of it along with the gradual expansion.

Does it also mean that the gravity of the next higher scale universe is pulling the matter in this blackhole universe that we live in apart?  Is it the missing Dark Energy?  Is that the dimension where gravity leaks?

I wish I knew some cosmic mathematics to delve deeper into these ideas.  But I'm sure someone who does can tell me why I'm wrong and why a singularity can expand, can even inflate, without bending any rules of blackholes.

Regards,

Kevin