A lot of criminality involves with bitcoin because bitcoin is something that the government is not doing anything with.
So it is not so hard to like scam someone.
According to me bitcoin has no concern with the increasing ratio of the criminality because bitcoin has nothing to do with the criminality, criminality is raising for the lack of the values and the importance of the people , it is up to the people who use bitcoin that how they use it there are good and the bad both kind of people around us so if they are taking the disadvantage of the bitcoin then we cannot blame bitcoin for it because a lot of noble deeds are also happening with bitcoin such as funds and charity etc.