is bitcoin more popular than US Dollar ?
Even a year after the post, bitcoin did not become more popular than the US dollar, because there are still many people who have not even heard of it.
It is because that bitcoin is still on its early age and dollar is established a lot of years already. But I know there will be the time thay everyone will talk about bitcoin and it is the one that will be used by everybody. And there's no need for bitcoin to becone popular, it will just happen suddenly.