bitcoin is a double edged sword on one hand using it provides security on the internet since no one can trace you down and on the other hand it provides a big opportunity for hackers and black market dealers that use it for selling drugs and other illegal stuff since it provides anonymity,but it all depends on the person that is using it
The bitcoin is not totally anonymous. It is pseudo anonymous. So you can be traced by using the bitcoin.
That is true. As the trail can't be destroyed in blockchain, the user can be tracked back with varying levels of ease. However, if the user mixes his coins, then it takes a lot of time and effort to track him (an example is Tomá Jiřikovský, the Sheep Marketplace thief).