Can you tell me about the long term problems that colonizing asteroids entails? It feels to me that colonizing the surface of planets is very wasteful: the enti

Can you tell me about the long term problems that colonizing asteroids entails? It feels to me that colonizing the surface of planets is very wasteful: the entire core is rich of various elements which you could access if you disassembled the planet (there is no other way than disassembling it).