I'm a State actor. I can hire detectives that will go through the blockchain and monitor your traffic, and I'll likely get a fair approximation of how many bitcoins you have. Or you can just tell me when asked, as a good law-obeying citizen should do.
This is how all tax works, btw. Income tax is nothing but a wealth tax limited to wealth accumulated over a certain period. There is nothing impossible about it.
This is how all tax works, btw. Income tax is nothing but a wealth tax limited to wealth accumulated over a certain period. There is nothing impossible about it.