The theory of anonymity was nice in that the .gov didn't know one aspect of your financial life. However, they proved that the blockchain inviolability was a myth when they tracked down those Russian hackers a few years ago. They have immense computing power at their disposal and will use it to steal what they want from you. The only remotely 'safe' thing is to use cash, and even that is suspect. Just wait until they impose a digital currency that they control on us. Gonna be an epic disaster for anyone not in the club.