Normally speaking, taxes are normally  being collected by government in such differet countries, the legality of a certain businesses are undergo with a tax payment. So, if bitcoin will pay taxes or government force to collect taxes from bitcoin owner supposedly bitcoin become legal and endorse by government. If we are a normal citizens on our living country, we must pay taxes without any persons force us to pay, it is our rule to support our government by paying taxes so that our country economic system developed. The economic system in every country's are base on a taxes being collected, without payment of taxes it will result economic shutdowns.