Before bitcoin started existing monetary crime have been existing. Bitcoin is not a reason for monetary crime, bitcoin is just for everyone and does not discriminate but accept everyone.
It's just a classic story that is always wrapped in some excuse that bitcoin is bad. This happens often and the reason remains the same because bitcoin can be used by irresponsible people to carry out their actions.
But actually if you look at the comparison of fraud or scam cases that are currently happening isn't fiat also the same. what's the difference with bitcoin? why aren't they called dangerous? the only reason I can see is that fiat has always been one of the main needs for all of us and bitcoin is only a small part of that but on the other hand of course with reasons like this we come to know that saying bitcoin is dangerous because it indicates the crime factor is only a made-up reason to weaken bitcoin.