Wow. That's an interesting thought.

I could picture that being used in a sci-fi piece explaining how an advanced civilization manages to build their power sources. Just feed a large enough amount of matter into a condensate until it eventually is big enough to start eating it's own environment with gravity.

Of course, the near-zero temperature would need to be maintained, and that would be pretty tough in something as energetic as a black hole. (It also begs the question, does a black hole evaporate faster when it's hotter? We know it evaporates more and more quickly as it shrinks, and that probably equates to heat somehow.)

(Yes, I know this post probably belongs in the Sci-Fi subject area, but this was where it fit. smile )

m