has this being tested along with singularities ?

a singularity does'nt have infinite mass.

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

Unless you are an n-dimensional theoretical mathematician with a head full of squirrel food it's not possible for us lesser mortals with normal 3 dimensional perception to get a grip on what's happening in the 11 dimensional space around us so what is actually happening and what we perceive to be happening are two different things. Which is a really waffly way of saying you might be right.

If you define a 'universe' with its own physical laws, those laws would let it ('your universe') to exist inside, or outside, or both to any referential system... A universe with it own laws is so different to our universe and so far to our horse sense, that can be as any 'if', but we cannot visualize, nor understand it.

I think this exotic universe is too far to me. Maybe it can exist, but surely I cannot know that.

This reminds me of the comparison of a single atom to the solar system. Very similar in many ways, but wow the people on those atoms are so small I can't get there.

It seems to me that OUR universe is a oscillating system exploding from a black hole to eventually being drawn back in and compressing EVERYTHING just to repeat. Singularities just pose impossible solutions in our limited minds. We are just too chained to our limited perceptions.

Thats a fun hypothesis, nice mind you have.