Maybe calm down, take a deep breath, then re-read my post in full and make a special point to read for comprehension this time. When you do, take particular note that I didn't say anything about the Taliban using bitcoin. I'm addressing two separate points in the OP, which is easy to tell because I separated the two points into two separate paragraphs. You worked yourself into a tizzy for no reason. Next time you respond to something I write, make sure it's actually on topic.
OK.. let me analyze your post once again, but I really doubt I would ever agree to your views.
Yes, obviously and unequivocally any financial system that cannot be blocked or sanctioned provides safe haven for terrorists and other bad actors to facilitate their illegal and harmful actions. There are people on these boards who instead of acknowledging reality get angry when you state this obvious fact. The inability to acknowledge reality disqualifies all their other opinions, as they’ve proven themselves too partisan and to irrational to be taken seriously.
You want a financial system that can be blocked and sanctioned. Essentially you want a centralized system, which can be abused by the government for whatever way they want. Such a system have failed in the past. And although it is the ultimate wet dream of every socialist, I can't agree to such a system.
Just because 0.1% of the Bitcoin transactions are used by criminals, it is ridiculous to blame the entire cryptocurrency community for that. For criminals, the preferred mode of payment is fiat currency and despite the fact that fiat transactions can be "blocked" and "sanctioned", the usage of fiat for such operations is growing with every passing year. So what does this mean?
The solution is not to use a system that is completely under the control of the government, but to increase the efficiency of the law enforcement department. They are just giving out excuses, to hide their own failure.