ok, if it comes to singularities the laws of classic physics break apart. its a single point in space with infinite mass. some say its believed they might exist inside a black hole. Others say its the origin of our universe when it initially came to an unexplainable expansion of such a singularity.
Now i'm curious What if.. the universe did not have a big bang, but a some sort of 'inner expansion' of such a single point. Lets assume this single point (maybe in a black hole) is in fact the outer shell of a space which is shrinking inside such a thing couldn't it create a 'universe' inside with its own physical laws ? where we sit in right now having the impression that the continuous shrinking is still going on for 13 billion years and appears as an expansion for us sitting inside ?
It is not yet known whether our universe will continue to expand forever, expand to a steady state or expand to a limit then contract all taking billions of years and all depending on the total mass (and energy convertible to mass) of the Universe. If the universe contracts back into a singularity, what then? Perhaps there is a pendulum effect that the universe re-expands on the 'other side' of the singularity in a negative vs positive polarity and the oscillations continue (without us) forever. Your thoughts might fit within such a scenario, but I doubt that it will affect the cost of real estate either way, right?
To start, your description of the singularity which our universe sprang from was a point of infinite energy, no mass existed before this point began to expand. Nor does the theoretical singularly at the centre of a black hole have infinite mass, the entire black hole has a finite mass. Your question is a mind stimulator but it is difficult to imagine that a point with zero radius, as physicists describe a singularity, can shrink to a smaller size. That's what I think.
The universe is the result of a finite potential that came into existence sometime after time zero. A single space-time pulse of minimum size and duration The pulse expanded radially at an accelerated rate for one-thirty billions of a second,when it attained the speed of light the acceleration stopped. The result was a 2 cm sphere,of maximum density with all the ingredients to evolve into the universe we see and experience to-day.
Fist of all, the singularity has infinite density, not infinite mass. The reason is that density is mass/volume. A singularity has zero volume so regardless of mass the density goes to infinity.
Second, we have no theory as to what happens in a black hole so what you propose is entirely possible. We also have no idea why the big bang happened so anything is possible