It doesn't matter much what you do about potential energy. The fact is that potential energy is just book keeping. It isn't anything special. It is merely a way of looking at something to determine how much energy you can get out of it, in the system that you are looking at. Heck I remember one dumb science fiction story I read one time where the protagonist needed more energy than he had available, so he just redefined the reference point for his system as being on another planet. From that point of view he had an enormous amount of potential energy. Of course the fact is that there is no way to get the energy out of a difference between 2 planets. And no, every particle of matter doesn't have enough energy to bring it back into contact with every other particle. Keep in mind that the universe is expanding, and apparently the expansion rate is increasing. If your hypothesis were true then the universe would be slowing down and/or collapsing.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.