I guess that depends on where you live. I pay taxes on my crypto assets whatever their value is on January 1st. So cashing into fiat does not make me pay more taxes than I already do.
i just hope, that tax for you is not high... a lot of people could save some money if debit card will be issued for MNX because of this kind of taxes. If Germany says "jump", most of the EU countrys just ask "how high".