What I don't understand is this: matter can not be destroyed nor created. So, does a black hole ever reach capacity? You can only condense atoms so far and under that kind of pressure God knows what radioactive elements they would form, but still, they would continue to build up. So: 1. does it reach capacity? 2. is there a solid, super dense center of a black hole. 3. Does a black hole ever die or is the universe going to be eventually consumed by black holes? 4. Is there any evidence that it folds time/space, that the event horizon is an infinity margin?
About one step removed from a black hole in density is a neutron star. Gravitational pressures are to the point where the protons and electrons are forced together.