Strange as it may seem, the Schwartschield black hole is a vacuum field solution. Mass or space-time's center of momentum remote frame energy in this case is a descriptor of the space-time geometry; not a descriptor of anything separate contained within it. So there need not be any physical singularity or anything else "inside" it at all. When a collapsing star makes the phase transition from plasma matter to black hole the energy that was previously described as being contained somewhere "inside" the space can afterward be thought of as being a parameter of the space-time geometry itself. No longer an entity that is contained at some specific location. There probably really is no such thing as a physical singularity.