Reasons like this is why Government banned bitcoin in some countries, they are preventing people on using bitcoin on such illegal activities, bitcoin was made not for this things, but for other things that could help any individual. Buying drugs of bitcoin is just a waste of money and time, why is that? it is because you spend your time on earning bitcoins and you will just going to buy some drugs out of it, and what for? just to satisfy your needs and after that you are going to start again?
What have you accomplished in this cycle was nothing, it is all devaluation, instead of buying drugs with bitcoin, spend it onto something more important, buy some clothes, foods, and so on.