https://www.walletexplorer.com/ identifies your wallet provider and https://www.chainalysis.com/ link them all together. I am not sure if these analysis tools are rendered void by the use of Mixer services, but it is still a problem for many people not using these Mixer services.
My main concern is IF we have given governments the perfect solution with Bitcoin to track all financial transactions. Something that is not currently possible with Fiat cash. I am not concerned about governments that are using this technology to track criminals or terrorists, but rather those governments that wants to use that information to get rid of their opposition.
These tools can be used for "Good" and "Bad" and we will never know if "Bad" people are using these tools to target "Good" people.
What is your opinion about this?
There is nothing wrong with bitcoin but there is something wrong with people. We do not have a total privacy when we use bitcoin and we only have a limited privacy since the government can access our information through the KYC and AML documents we submitted to the exchanges. I guess there will be a problem if the government leaders are abusing their authority but if not then we have nothing to worry about.