According to the Scale-Symmetric Theory (SST), before the expansion of the Universe, almost all baryon matter was in the form of neutron black holes (NBHs) clustered in protogalaxies. Here, on the basis of the SST cosmology, we present the mechanism that caused most of the matter in NBHs to end up outside the Schwarzschild surfaces of the protogalaxies in the form of high-energy plasma. The main reason was the violent collisions of dark matter (DM) with NBHs that started the expansion of the Universe. The too high abundance of gold suggests that number of collisions of NBHs was much higher than it is assumed in mainstream cosmology. On the other hand, the inflow of dark energy has forced the galaxies to continue moving away from each other, but also to increase the size of the galaxies. It is a verbal description with references to mathematical techniques.