You're talking about the black side of bitcoin. About terrorism and money laundering, mentioning Syria and Iran. I want to tell you that it is very easy to blame bitcoin for all sins, because no one will be responsible for these words. We've heard about Satoshi Nakamoto, but no one knows who he is or if he's alive. Where is he? That's why the government says such loud and dirty words to bitcoin. As for the banks, this is the government (in most cases)
Bitcoin has a future without black schemes (darknet)
Yes this is extremely important.
Bitcoin used to be largely used in illegal activity when it was first founded. But since it's growth and world-wide adoption it has certainly legitimized.