If the philosophy you believe is that cryptocurrency will eventually replace fiat, the argument is that you would convert your crypto to fiat when you need to pay taxes. This is similar to a gold bug that trades their gold into fiat at tax time. You pay a fee for the privilege but in return you aren’t wiped out by runaway inflation.

I love the cryptocurrency arguments on HN because they are melting pots of philosophy and arguments of fundamentals that question the very foundations of our modern economy. Very fun reading!