Bad actors are in every sector both Cryptocurrency and traditional system of banking. This they say to black mail Cryptocurrency because it's decentralized.
Basically, things will get worse if used by a criminal. Not only crypto, but even fiat can also be used as illegal activities. I think people are just not ready to accept the new financial system and technology.
Don't make fear an obstacle, but make it a motivation to study it well, so that we can adapt to find the best solution to avoid these negative actions.