If our universe is a black hole
What if our universe sits inside a black hole and the matter we actually have is the eaten matter of the universe above us?
We know that the speed of light is currently the fastest thing we know, but maybe that is only because of how fast the event horizon ate the light.
The black matter we only know of gravity, that lets our universe expand, could just be the pull of the outside event horizon that gets larger with every eaten thing,
Sorry I'm on new medication and in an manic episode