I was thinking about how a black hole evaporates and the firewall idea. If after Page time a firewall forms around the black hole, does that mean that the energy/mass, and entropy cannot increase anymore? The energy of the black hole is essentially supposed to be in the singularity, right? I think that is how it has an increase in energy. If the object coming into the black hole hits the firewall, then it cannot reach the singularity. Am I wrong about this? Am I misunderstanding a concept? Please help me clarify this.