Its not a good idea to relate bitcoin in criminalities which are happening. Bitcoin does not do anything about criminalities but rather its the people who who do them. Because there are people who want to earn money in short time, then criminalities like scamming or even killing happens. They do not want to take risk or do hardwork in order for them to earn money in a good way.
In fact bitcoin is a good help for people as the source of income and because it is open for all as long as we wanted to and believe in it. Lets not destroy the good image of bitcoin rather we should promote it more so that all may see and experience its benefits.