I ran across this video a while ago on what can happen to you if you don't pay your taxes. At some point during your Bitcoin career, the cryptocoin will be converted to fiat and that's how they will catch you.
https://www.youtube.com/watch?v=hf2fNEUPjQwIn the end, government will find out about our assets. Its better to paying our tax because we get profits from cryptomarket. Not matter we hide our assets, I am believe government will find out because in digital world anything can be tracked
indeed government will find a way to take advantage of the bitcoiner that is with tax. but if not yet legalized they can not collect taxes. though for anonymous reasons, but i think government is more sophisticated. i am sure government will find a solution for this