Who dares go to the bank and ask for a governer's bank account balance? But now we can know because BTC is open source and traceable, isn't Fiat the perfect one for crime than Bitcoin? With power you can be dirty with Fiat, but not Bitcoin, you will eventually be bursted.
This is not really true. You can track also fiat, it can just be hard depending on the setup but in many cases it is easy. An average criminal is not going to be able to set up offshore businesses and networks that make it hard to track the money and discover who is behind it. An average criminal can learn and start using Bitcoin very soon. As long as they don't do KYC, they can do a lot of things while hiding in the crowd so to speak.