Bitcoin is the most developed currency today, who use it for illegal purposes. And everyone is trying to blame the bitcoin just to blame him. Many resources, not just cryptocurrencies
I think It has nothing to do with bitcoin. Any disturbing discoveries in human history have originally passed through this phase, as well as bitcoin. The next phase is widespread adoption!
Unfortunately, some early adopters of all new technologies have become criminals. Their activities involve high-risk operations, so they are willing to use state-of-the-art technology.