Could our Galaxy been black hole that dispersed?

Our galaxy most probably has a black hole at its center which has a very large gravity which keeps all of the solar systems and solo stars orbitting around it. I doubt that our Galaxy came about due to a dispersed black hole it probably came about by a collapsed star becoming a black hole. This black hole then started drawing in materials from nearby space which in turn created new stars, planets, and other galactic bodies.

Do you mean that we are actually living in an alternate universe???

No, frankly. If this galaxy had been a black hole, everything would have combusted and pulled apart, chemically and physically speaking.

no i dont think so

black holes do not simply disperse. radiate off energy very slowly over billions and billions of years (hawking radiation.. that energy wouldnt create a galaxy (galaxies are made of matter...) and if there was a galactic mass black hole i would assume that would cause some problems and would take trillions of years to radiate away, which is longer than the universe has been around.

No.

Black holes do not disperse.

Our galaxy formed by material accumulating in a gravitational well formed by Dark Matter.