1) When you buy things to survive/thrive with crypto, you also owe taxes to the government
2) Crypto isn’t legal tender for paying your taxes in the United States (or almost any other country)
3) You (or your counter-party) have to use an exchange of some type to obtain USD and pay your taxes
4) If you don’t pay your taxes the government will seize your assets and do it for you
5) If you resist the government will use violence to incarcerate you
I hope that explains some of it.