No crypto is private unless you never want to spend it. 
 In the UK HRMC says crypto investors must declare the following: 

    The type of tokens 
    Date you disposed of them 
    Number of tokens you’ve disposed of 
    Number of tokens you have left 
    Value of the tokens in pound sterling 
    Bank statements and wallet addresses 
    Records of the pooled costs before and after you disposed of them 

That leave you with zero privacy from the govnt, unless you want to break the law.