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.
The number of criminality in some countries in the world is increased, but they should not blame the Bitcoin because bitcoin is very helpful for us when it comes to financials. The real problem is "some of users of bitcoin" taking advantage to do criminality and illicit activities, like illegal drugs and they use to buy guns and etc. that is the one reason why bitcoin was banned in other countries.
Yes, bitcoin develops both advantages and disadvantages, But we must use bitcoin in a nice way or in a positive.