Are black holes the most dangerous energy forces in our universe?
Yes and no.
Purely in terms of destructive capability there is nothing more powerful. But they also play an big role in the existence of galaxies. It is believed that most galaxies have a black hole at its center. Just as the sun's gravitational influence extends through our entire solar system and keeps it together, so too does the gravitation force of the black hole at the center of the milky way galaxy. And while the genesis of a black hole is fairly well understood, nothing is known about how long they last or even how they are made up.