Hey so i have a naive question that i always had since i was young, but i never really could find an answer to it. Lets say you have a black hole isolated in a vacuum, in a closed system. Dark matter is supposed to be a sort of weakly interacting massive particle, which exerts a gravitational pull(?), and undergoes gravitational influence. If dark matter is introduced into the system with the black hole, wouldn't the black hole "suck it in" and grow?