To get rid of taxes, mostly, the concern of Exchanges I guess. Governments already charge "Commission Fees" gaining from Cryptocurrency. This ratio is %0.2 in my country. The Government does not know how and when I earned and from where. But you need to complete your KYC to withdraw your money. And Exchanges gives personal details to states. This is a little bit sad. And does not fit decentralized philosophy.

But I think this a good start. %0.2 is a really good ratio if you think %20-35.