I once read an article that says bitcoin is used as a payment transaction for terrorists and hackers. And maybe you guys in this forum also already know it. But here i want to convey my personal opinion in that matter. I think that internet and bitcoin interrelated. Many terrorists and criminals use internet .so also with bitcoin which used perpetrator However, despite all these issues, do people make concrete efforts to ban the internet? No. Not because removing and banning Bitcoin is difficult, but because the internet offers more positive than negative. For the same reason, we have to be more careful about our mindset for Bitcoin, because much evidence has shown that Bitcoin brings many positive, if not more, effects than the internet. Internet and Bitcoin are just devices that 'bad guys' and 'good people'. Fortunately, the world is filled with more people in the 'good people' category.
Ofcourse bitcoins are used by criminals, They can easily buy weapons, Sell and drugs without showing their identity or info. Actually on internet everything is used by them. Hacking bitcoin, wallets also a source of criminally. And that's the main point why some countries' government want bitcoin to goes down, All they're doing just banning the bitcoin.