I've heard about bitcoins used by terrorists, I think they are not responsible, they just want make bitcoin shunned by the public, so the part of people who wants the bitcoin crushed will be happy.
and, I agree with you, bitcoin is the legal currency that will be accepted by the world as a tool of transactions, and it will happen within the next 5 or 10 years.
I am really astonished with people who can even think of such stupidities. Like someone was saying, bitcoins are becoming a source of corruption, bitcoins are being used throughout in dark web and human trafficking and all such crimes. Dudes, this is bad image of bitcoins that we are promoting. Some bad people are using wrong side of the coin and we are happy to share it, causing devaluing to bitcoins.