will be able to adopt with it especially if it is not supported by the government.
They are both used by the people and I do not think that they are for the people. Bitcoin is definitely created not for people but rather oppose the financial system where centralization is observed. While USD is created so that government will have a distinction when it comes to currency. I won't make this two compete since they have each features and advantages. Beside we can always use both whenever we want.
Precisely because bitcoin is made different I can freely choose the financial system that I use, if bitcoin is set, everyone's attention will return to fiat and the majority of bitcoin volume will shrink, so far I have the convenience to own and use both. But I also do not refuse if bitcoin will be regulated, we also need bitcoin recognized as legal tender.