From recent news in India it is heard that bitcoins are used to sell drugs..I know its a currency and it is also used as a normal money... but these can create a bad space in people's mind that bitcoins are used to sell drugs..so they will not use bitcoins... Conclusion is that BTC is also a currency which is having a high value in the market..and bitcoins must not be used in these illegal activity which can reduce its usage and value.
Actually Bitcoin is already involve in this illegal activities even before, in dark web.
you are right. even when bitcoin has a price, bitcoin is always used as a tool for illegal transactions. but, for the time being, it has been reduced, and even bitcoin has been used for positive things. its high price proves that bitcoin is really good.