See: Big Bang Energy out of Nothing, or a Compressed Rigid String Nucleus.
The boundary between stable and unstable micro-black holes is unknown untill now.
The Big Bounce even in the multiverse with 8 or 12 entangled universal bubbles.
Ashtekar en Singh : bouncing universe. 2006.
http://vixra.org/pdf/1209.0092v1.pdf
The conclusion: Dark Matter Black Holes do not eat Fermions, but repel them.