The US gov cannot move BTC without it becoming news. In fact, it was recently in the news that they moved a lot of BTC to coinbase. This is trackable without a big brother apparatus. People pay attention to them just because. They have thousands of employees to track all the rest of the BTC and they still can't prevent me making an anonymous wallet to receive, while my KYC wallet only spends. They need constant costly maintenance to monitor us, while I need nothing to thwart it because nobody cares about me. Eventually the surveillance state loses to entropy, and in the meantime is useless against anyone who cares about being tracked.