Paying taxes is one thing, and of course it is necessary. Extra value is extracted by printing more and more money. USD used to be backed by gold, but they took that away. In addition to corrupt governments extracting value by printing more and more currency, counterfeitters also do the same. Bitcoin fixes both of these issues. There is absolutely no reason why Bitcoin and taxes can't coexist.
Furthermore, with bitcoin we can electronically transfer exactly how much value we want to without having to trust every single vendor with our credit/debit card numbers. Have you ever had to cancel a card because of fraudulent spends? Well, millions of Americans do every year and this also doesn't happen with Bitcoin. You send exactly how much you want to, you don't hand indefinite access to your funds to every single vendor to sell your information or steal from you whenever they want. In the last 2 weeks I've had over $400 stolen from my debit card because of this idiotic system.