Considering the fact that the common density of the black hole within its Schwarzschild radius is inversely proportional towards the square of its mass, supermassive black holes are much less dense than stellar black holes. The common density of a 108 M☉ black hole is corresponding to that of h2o.[184] https://econopass.com/news/science-technology/7-mind-blowing-ways-the-technological-singularity-will-transform-humanity/