Anyone else believe in the universe shrinking happening? Considering the universe is expanding from a singularity - it MUST have its limits?

There is no limit that we know of

Then Absence of Proof is not Proof of Absence

And up is twice half way up

It could very well happen and may be happening right now yet we would have no way to know if it's occurring at some distant point in the universe given the vast distances and time it takes for light or other rays to get here. Since no one knows what dark energy is that is supposedly causing the universe to accelerate in expansion, it follows that such expansion might be altered at some point as well and could transition into a collapse or shrinking. Or a phase change in the Higgs field.

"Collapse of the universe is closer than ever before"

"Maybe it happens tomorrow. Maybe in a billion years. Physicists have long predicted that the universe may one day collapse, and that everything in it will be compressed to a small hard ball. New calculations from physicists at the University of Southern Denmark now confirm this prediction -- and they also conclude that the risk of a collapse is even greater than previously thought."

https://www.sciencedaily.com/releases/2013/12/1312...

https://phys.org/news/2015-03-universe-brink-colla...

What would limit the expansion and wouldn't that factor become a part of the now expanding universe? Existentially speaking, our universe expands the more we look at and understand it. When we were in utero our universe was the womb. There were many anomalies to this comfortable existence like our parents voices and the ultra sound machine, but the universe was small. Now we look around and the universe is anyone's guess (13.8 billion) light years across and getting bigger every second if you've an inquisitive mind.

From the physics angle, what form of resistance so to speak would stop it. Resistance is a force. Gravitational resistance gets weaker the farther away you get from the other mass object which would mean that not only won't the universe get smaller, it will get bigger faster. Electromagnetic force (light) is either attractive, repulsive or nonexistent depending on the mass objects affinity and the light's orientation. (A side note: Light does in fact have mass otherwise gravity from say a black hole wouldn't effect it.) So now we're down to the weak and strong forces. The weak forces pretty much govern nuclear decay It's as the name would imply the weakest force but is one of the rulers in it's special domain of about an angstrom or two. It pushes apart nuclei and once they're more than an angstrom or two apart they're out of the range of the strong forces. The strong force as the name would imply is the strongest of the 4 forces (but has the shortest range). At about an angstrom or less once the distance between the two mass objects is greater than that, it's essentially powerless. So here's a noodle fryer. With ostensibly nothing stopping the expansion of the universe, should mass objects (atomic nuclei) shrink due to a still present and constant strong force with a diminished gravitational force helping less and less a diminishing weak force? If so wouldn't the change in the over all force gradients mean that atomic nuclei would collapse at an ever increasing rate? With atomic nuclei collapsing at an ever increasing rate, wouldn't the kinetic energy (Amps) and the potential energy (Volts) soon be equivalent? With such an equivalency what would happen?

There is no universe. The universe is our self-contained, stationary, fixed Flat Earth. That's it. There are no other "planets" to escape to - so we'd better start taking care of our home.

A singularity is not always a point. A singularity could be infinite (and it could be a volume).

We do NOT know if the universe expands. All we know is that SPACE is expanding. There are a few geometries where space could expand, and yet the universe would not need to, even if it were already "full of space".

Relatively recently (in the last 20 years), a new method was devised to measure the rate at which expansion was slowing down. Surprise! it was found that the rate of expansion was increasing. Whether or not we "believe" it to be impossible... is irrelevant. Space is expanding faster and faster. Will this acceleration continue or is it just a phase (like inflation was, billions of years ago).

In any case, it does look like expansion will never cease.

The universe is accelerating in its expansion right now. It could expand forever. It has no limits. Or it could stop expanding and contract back to a point singularity again. We don't know which will happen. Currently, observation seems to indicate expansion forever.

Why *must* it have limits...? What sets those limits?

Belief and science don't actually belong in the same sentence together. You are either educated or you are not.

Shrinkage is only a problem if it goes into cold water.

Unless you think you are smarter than Einstein, the universe can indeed expand without limits regardless if it started with a singularity or not.

Solutions of general relativity show that. Recent observations that the universe is accelerating show that.