It matters because it is basically funding the worldwide crime system, if some bought slaves for 1000s of bitcoin, that is now worth many millions of dollars an

It matters because it is basically funding the worldwide crime system, if some bought slaves for 1000s of bitcoin, that is now worth many millions of dollars and guess what? That money is going to be reinvested into a bigger, better and more sophisticated criminal organization. Crime is a business like anything else, profits get reinvested