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
Dollar is for the people also and it is the most popular currency in the world IMO, bitcoin is for the humanity but not all
will be able to adopt with it especially if it is not supported by the government.
i think we shobuld not compare bitcoin with USD as bitcoin is online digital and universal decentralize currency, while USD is regional, physical currency belonging to specific area. bitcoin is very new as compare to USD. bitcoin will still take some good time to become more and more popular because currency most of the people of the world still do not know anything about bitcoin. i think they still need good information about bitcoin.