Indeed, a true nothing would have neither time nor place nor qualities of any kind.
Once there's a god, there's something, and after that, nothing could be ex nihilo.
(Indeed I see no credible alternative to matter and energy pre-existing the Big Bang.)
If something can spring from nothing, could it happen again and wipe us out?
If the universe is massive enough to pull all of the matter back again (I think that science established that it is not), then it is a black hole. But I was always told that no one could get into a black hole without being crushed. As it turns out, we're in an expanding universe (not one that is crushing us).
Once the universe expanded to the point that distant parts of it are moving away at faster than the speed of light (due to the acceleration of the expansion of the universe), it outpaces gravity. So no amount of gravity could pull back matter that travels away faster than the speed of light.
As the solar wind travels through interstellar material, it suddenly slows down to the speed of sound (this is called the break point), and it was physically observed by spacecrafts. It is interesting to note that this interstellar material exists (rather than space being a vacuum, it is filled with sparse matter....hydrogen and helium atoms). That sparse matter reddens light by scattering (blue changes direction). Could it be that the red shift (that is taken to be a Doppler red shift) to measure the speed of distant stars might instead be reddening due to travel through interstellar material?
We may never know the origin of the universe, but we can see what happened after it sprang into existence. It was, at one time, a dense plasma ball and the gravity was too strong for matter to form. As the universe expanded, mass became less dense, so that the plasma coalesced into mass (hydrogen gas). While it was a plasma ball, electromagnetic energy, in the form of light, was unable to escape the plasma ball, so it scattered within the plasma. As the mass coalesced the electromagnetic energy was free to exit. This electromagnetic energy is called the background radiation of the big bang (which proves that there was a big bang, and lends credence to the Lambda Cold Dark Matter theory). It is 2.725 degrees Kelvin, and the spectral radiance peaks at 160.23 GHz.
As a plasma ball, the universe wasn't expanding as fast as it did once matter coalesced.
Cosmic microwave background - Wikipedia
https://www.aanda.org/articles/aa/pdf/2020/07/aa37840-20.pdf
The links above explain more.