Buterin denies being a billionaire yet, for what it is worth.
This is a tricky subject. I completely understand why people would want to protect money from the government - especially the crypto community, with such strong ties to the anarchist and libertarian movements. Yet, the truth be told, cryptocurrency is not going to suddenly make tax evasion legal or easy. If anything, this is a terrible way to try and avoid taxes - as soon as the wallet can be connected to a person, they are in HUGE SHIT if they haven't been paying taxes.
I'm a fairly average dude, not really trying to overthrow the government, so I'll be paying all my taxes without any extra pestering from the gov. Just gonna pay it up front and sleep easier at night.