Primordial Planck mass black holes (PPMBHs) as candidates for dark matter?

It is proposed here that due to rapid cooling at the end of the Planck-era a second order phase transition with Planck-size space-time-energy fluctuations may have led to a precipitation of Planck-dimension real objects with masses around mP and hence a Schwarzschild radius 2GmP/c2. This equals twice their spatial dimension lP; hence they are black holes. They could have survived through inflation and expansion because of their extremely small cross section for the fluctuations that are supposed to cause the hypothetical Hawking decay. In the case of our galaxy they could thus be the missing WIMPS of the dark mass halo, consisting of ~ 1050 PPMBHs – in contrast to the ~ 1068 baryons in the stars – both bound together by gravitation with negligible other interaction between the two. They would constitute a storage of gravitational energy three orders of magnitude larger than the energy stock of H → He fusion, an energy to be released somehow when they very slowly coalesce to form big black holes.