Bitcoin will always be an alternative to fiat currency, but fiat currency will not go away anytime soon. Banks need people to call on them to survive, and governments in several countries will try to ban Bitcoin, because they see Bitcoin as a real danger to the government
But smart people don't pay taxes anyways, hi there Tim Cuck!
Smart people even pay their taxes, because if they don't pay, they will get a drastic fine.
Payment of Taxes are compulsory any way but paying drastic fine for none of the taxes can only happen in a developed world where there's a working system in all the activities of government and its institution, and not like in an underdeveloped countries where there are no working system to check mate who pay taxes and who did not pay taxes.