I was thinking, a particle a certain distance from another would have a certain potential energy. Now the potential energy must be in the form of extra mass if im not mistaken (as its not kinetic, however does kinetic energy increase mass?) so therefore an object is at its maximum mass at infinity and at its lowest at 0. I can then conclude that the at the pre universe, the 'singularity' or whatever you call it would have had less mass than the current universe. Does this mean that the early universe had less energy than the present day?