Black holes never shrink.

“When two black holes collide and merge, they release gravitational waves. These waves can be detected by the LIGO-Virgo-KAGRA detectors on Earth, allowing scientists to determine the mass and spin of the black holes. The clearest black hole merger signal yet, named GW250114, recorded by LIGO in January 2025, offers new insights into these mysterious cosmic giants. Credit: Maggie Chiang for Simons Foundation” (ScitechDaily, Hawking Was Right: New Data Confirms Black Holes Never Shrink)

A black hole loses its mass, not its size. 

Hawking was right. The merged black hole’s surface area is as large as the merged black hole's total surface area. That means back holes don’t shrink. So, black holes don’t shrink when they send gravitational waves. The reason for that is in the universe’s expansion. The quantum fields that press a black hole into its form turn weaker. So, if that model is true, the reason for gravitational waves is in the universe’s expansion. When quantum fields turn weaker, they allow a black hole to send gravitational waves. We can think of a black hole as an onion with multiple internal structures. 

Or, shells. And the most out of those shells is the event horizon. When the gravitational wave travels out from the black hole, it sends one of its shells outside the black hole. And then the inner shell takes that escaped shell’s position. So the black hole’s size will be the same, because the energy, or quantum field that presses the black hole in its form, turns weaker. This means black holes’ evaporation does not have an effect on the black hole’s size. When the quantum field around it turns weaker.

A black hole sends so much energy. It can keep its energy level relatively at the same level as it was when the black hole formed. But what does that mean? If the end of the universe is the so-called big rip or big freeze, that means that in the very end of the universe, black holes’ existence ends. They release information that they stored inside their event horizon. But if the end of the universe is the Big Crunch, that means that the black holes start to grow. The model goes like this. The expansion of the universe continues.

But because the universe turns colder, the energy level of visible and dark energy decreases. The universe also leaks. Energy and radiation will travel out from the universe faster than particles . This means that. Gravity starts to win. When the universe’s expansion ends, and it starts to fall, the energy level and density of its quantum fields start to rise. That effect starts to pack material. And energy to the black holes. This means the black holes can expand. Or their size will be the same.

But anyway. Black holes start to travel. To each other. And in the ultimate fate, all black holes that pulled all radiation into them fall into the same point. The reason why the large black hole exists longer than the small one is. Because its surface area is larger. The outside quantum fields can press that black hole from a larger area than a small black hole. The surface area of a large black hole is relatively smaller. Than small black holes. That means energy loss in large black holes is smaller than in small black holes. So, a small black hole is less energy efficient than a large black hole. This means that a large black hole can exist. In lower-density areas. Than the small ones. This model raises interesting questions. If the density of the quantum and plasma fields around the black hole turns higher. 

Does the black hole stop sending gravitational waves? This requires that quantum fields and particles fall into the black hole symmetrically. When a black hole sends its most out shell away, that pulls radiation longer. Or traveling shell wraps the quantum field shorter in front of the traveling shell. And then. The valley or traveling ditch. Travels behind that short wavelength structure. 

But if the material and energy density around a black hole suddenly rises, that thing can deny the escape of the outermost shell. This means that if a black hole suddenly impacts a nebula. Or energy density in the way. Those particles. And energy impacts symmetrically with it. So, if a black hole pulls a nebula or some quantum field around it in symmetrical form, that symmetrical energy load can push radiation back into the black hole. 

https://scitechdaily.com/hawking-was-right-new-data-confirms-black-holes-never-shrink/

https://scitechdaily.com/the-universe-will-end-in-a-big-crunch-physicists-warns/

https://en.wikipedia.org/wiki/Hawking_radiation

https://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe