According to statistics, bitcoin occupies a niche in terrorism, without it there were illegal transactions and money laundering ! I don't think the bad guys will use it as a priority !
Were there no money laundering when there the no bitcoin ? The answer to this is No.
Bitcoin do make money laundering easy as compare to fiat but I just don't understand this is not a drawback of the currency itself. This is the mindset of the user who use it in a negative way.