Bitcoin is fully Anonymous so chance to use criminality. Bit coin is used to buy drugs and weapons.Bit coin exchange is used for most cyber crime activities.
They are different then each other bitcoin is a digital currency and crime is different thing when we study bitcoin then we can understand that why bitcoin is here and how to use bitcoin is basically helping humanity and we need to use bitcoin for good things not for bad bitcoin always support people around the world so if someone is using bitcoin for crime or any bad thin they must stop it and let bitcoin help to the people.