Many say here that Bitcoin can indeed be tracked for transactions, but it's better if there is a more sophisticated system to find people who commit fraud or take our Bitcoin secretly, for example, their data can be seen or their faces recorded with sensors that are has been prepared with a tool that has been designed. That's just my imagination.

It can be but for now it's not worth it. Teams that do it like for the FBI are spending a lot of time and human resources to track people and they're interested in big fish like that guy owner of BTC-e that was laundering money. So if you're a big scammer who took millions you have reasons to worry but then you can probably run to a country with no extradition
