The concept of the universe rebuilding or shrinking is not well-defined in the context of our current understanding of cosmology. It's important to note that the statements you mentioned are based on certain theories and observations, but our understanding of the universe is still evolving, and there are many open questions.
According to the prevailing cosmological model known as the Lambda-CDM model, which is supported by various observational data, the universe is indeed expanding. This expansion is driven by dark energy, a mysterious force that seems to permeate space and accelerate the expansion. However, the expansion does not imply that the universe is necessarily "rebuilding" or "shrinking" in a conventional sense.
When we say the universe is expanding, it means that the distances between galaxies and other cosmic structures are increasing over time. However, this expansion occurs on a large scale and does not imply a fundamental change in the structure or composition of the universe itself.
As for the concept of shrinking, there are some speculative theories that suggest the possibility of a "Big Crunch" scenario, where the universe would eventually stop expanding and start contracting, leading to a collapse. In this scenario, the universe would eventually reach a point of maximum contraction, possibly resulting in a new cosmic event such as another Big Bang, leading to a new cycle of expansion and contraction. However, it's important to note that the evidence for a future Big Crunch is currently limited, and the observed acceleration of the universe's expansion suggests that a different fate, such as eternal expansion, may be more likely.
It's also worth mentioning that the terms "better" or "worse" are subjective and depend on one's perspective. The fate of the universe, whether it continues to expand forever or eventually collapses, has implications for various aspects of cosmology and our understanding of fundamental physics, but it does not necessarily imply a moral judgment of good or bad.
In summary, our current understanding suggests that the universe is expanding, driven by dark energy. The concept of the universe "rebuilding" or "shrinking" is not well-defined within this framework. The fate of the universe is still an open question, and scientists continue to investigate and refine our understanding of its ultimate destiny.