Why are black holes losing their mass?

The fact is that gravitational waves have some role in that process. Whenever a black hole sends gravitational waves it sends mass or energy out of it. The fact is that. The mass loss of black holes means that there is less material and wave motion in the modern universe than in the past. Black holes cannot get enough material and wave movement to replace the energy that they lose all the time. Black holes travel out energy because their energy levels are higher than the environment's. Energy travels out of black holes. 

Loss of mass means that energy and material that fall in black holes cannot reach the singularity. So the singularity or material in the black holes is like in the bubble. Extreme high-energy radiation would pass into the middle of a black hole. But maybe, the very fast rotation or spin of the black hole's material causes an effect that the singularity is like in the electromagnetic bubble. That means the black hole's singularity or material is based on an electromagnetic vacuum. And the wave movement or quantum movement moves out of the singularity. It travels through an electromagnetic vacuum. That thing causes energy waves that travel out of the black hole's nucleus. And those energy waves are called gravitational waves. 

The fact is that hypothetical antigravitation doesn't need in advanced spacecraft. The standing gravitational wave in the direction where the craft is is enough to transfer the hypothetical craft. The idea is that stationary gravitational waves pull the craft that is behind it. For that system to work perfectly, synthetic gravitational waves are needed. And that means this system could be in use in the very distant future. 

Would it be possible for black holes to change material to WIMPs?

There is one problem with that model. That requires changing interactions between particles. The hypothesis is that visible material can turn into WIMPs in black hole poles. Or maybe that thing is possible in the extremely high-energy areas between the event horizon and the material disk. The needed change in the interaction between particles would happen in massive gravitational fields where gravitation locks all particles in the same position. There is a possibility that massive gravitational fields along with very high energy levels can turn visible material into WIMPs. It requires a high energy level and a massive gravitational field that locks particles in a specific direction to be able to accomplish that. 

So what if the material falls into the black hole and turns into WIMPs? The fact is that dark matter has only one known interaction between visible materials. That interaction is the gravitational interaction. So if material or part of material falls into the black hole and suddenly turns to dark matter that thing causes a situation where lots of material loses its ability to another type of interaction than gravitational interaction. That thing means lots of electromagnetic energy is lost from the transition disk.