not only in the cryptocurrency crime in this world everything is increasing the crime rate so blaming the cryptocurrency only for the crimes will not give any solution for that so I think we need to make the clear decision before what we do this only makes everyone to be clear minded in the future.
if you look broadly, crime happens every day, even fraud outside crypto. when a security is not so tight, there will be an increase in crime, and it happens in all fields. in terms of cryptocurrency, I think indeed some fraudsters involve crypto for their crimes, but, having experience and information, can make us avoid it.