I do not understand why I should compare these currencies. The dollar is for the government, and bitcoin is for the people. So it was from the very beginning of the existence of bitcoin. And bitcoin will never replace the dollar
Actually, bitcoin was created first to give people a more convenient way to pay for online shopping and other online services, that way it replaces the other online payment method with providing a more secure way, but with more people using it and prices get higher and higher, bitcoin became a type of investment and not a way of payment so we cant really compare it to the dollar right now, and instead we should compare it to the gold.