It can for sure. I don't think Bitcoin was meant to be used for crimes or illegal transactions - that's probably just what some criminals thought of after it's been launched and became popular.
At the very beginning it was SilkRoad that more than successfully was operating with solely Bitcoin as form of payment. I personally see it as a great example of how well Bitcoin's currency aspect is functioning. And yes, I know that the majority of the trades where related to illegal goods, but for me it wasn't a problem at all. That's however not the case for non Bitcoiners. They see dark markets as the center of what Bitcoin as currency is being used for. Some even label Bitcoin as the
currency of the underworld. Ridiculous of course, but the media has done it's job more than well when it comes to brainwashing people.
Bitcoin can be profitable through mining, so you don't need to complete illegal transactions in order to get your profit with it. I'm using it for good reasons and I always did..
It doesn't really matter how profitable Bitcoin is. It's money with great features where you also enjoy some sort of anonymity. We must blame people for their usage of Bitcoin, and not Bitcoin itself. If you look at how many horrible things are being done with fiat, and that barely anyone blames fiat for it, then why should you blame Bitcoin? Doesn't make any sense.