Yes, you have to pay taxes. There are cryptocurrency tax rules, in fact, people in my country pay taxes because they buy and sell coins. They have to follow the rules or else they will face the law. Crypto is a capital asset like stocks instead of cash. It is stated in the rule that you will be the one to pay for the capital gain tax if you sell crypto profitably. You will be responsible for paying the gains tax. Even if you use your crypto to pay for a purchase, there is tax, value-added tax. I think it is an automatic deduction in the purchase counter, a customer paying in crypto will be charged for taxes if you receive a greater value than what you paid. You are required to pay the difference. You cannot hide yourself from your obligations to pay taxes.