I don`t think that any govenment officials can track and steal your crypto currencies,if you store them on a decentralized wallet and you keep your private keys in a safe place. The Vietnamese communist governments might be really scary,but they can`t find your crypto.The european govenments aren`t that scary,they will never try to rob someone`s financial assets.
Well the government is interested in collecting part of your Cryptocurrency investments as tax, whether you earn them through mining, buying and selling, getting paid for a job or any other form of earned income. And as long as your crypto passes through centralized exchanges or gets converted to fiat the government will be able to track you.