The problem is, where is the government that are controlling and receiving these taxes? You normally associate taxes with governments and Bitcoin does not have a government. So, that must mean that the taxes are going back to the people that are experimenting in this experiment.
How nice must that be that taxes are paid and it is recycled and paid back to the tax payers again. Your argument does not make sense at all, because nobody is forcing anyone to participate in this experiment.

I agree. The argument is clearly untenable. Nobody is forced to join or hop in in Bitcoin or in any other cryptocurrencies. Hence, we cannot compare Bitcoin to that of the taxes collected to us by our respective governments.
How can you say Bitcoin is tax when it isn't even compulsory in the first place? Tax is due the governments, just for emphasis.