If the one country or government regulate cryptocurrency and put a rules and regulation to be follow including taxes then people has nothing to do about it but to comply this rules. Paying taxes is just a little amount than to have a big problem because you violate the rules and gain some punishment. Obedience is the best policy and there is no problem about it. Government also use this taxes for the improvement of our country and be happy to be apart of that because you pay your taxes.