Everythin is used for q criminal activity, i eon't believe that that fact could hurt bitcoin thqt much on the long run. Thqt fact could slow down btcs progress at the beginning but i believe it wont have any impact later on.
That is true that everything can be used for illegal activity. We cannot deny the fact that even the best of currencies are being used by people for illegal activities but there is nothing wrong in it. I mean if we are not using it for illegal activity then we don't have to worry or get upset that bitcoins are being used for any wrong activity.