https://www.deepdotweb.com/2016/01/23/bitcoin-playing-an-increased-role-in-crime-europol-says/Would you believe that the existence of bitcoin has increased the number of criminality in some countries in the world. This is the issue that was being thrown by the EuroPol and the UK Metropolitan Police. According to them bitcoin has played a huge role on the increasing criminality in their area. They added that a huge number of cybercriminals were using bitcoins in their activities.
This just shows that as bitcoin develops both advantages and disadvantages will tag along.
I don't tend to believe things like this because they usually cannot track the fiat trading of drugs/illegal stuff happening. The only reason they would be able to track the bitcoin stuff is because it can be traced backwards to other wallets/sources. The fiat can't really be(unless the serial numbers on the fiat was from a nearby bank or something).
It is a lot easier and more profitable to target older people by calling them and having them wire money to you through a scam, much easier than hacking stuff and coding viruses.