although whatever happens with bitcoin I still believe because bitcoin is the currency in the future replacing paper money which I think is not efficient because paper money can be damaged while the bitcoin won't be damaged whatever
The paper money of the states is getting damaged and getting old. However, for various reasons, access to bitcoins is lost. Now forever lost more than six million bitcoins.
The paper money of the states will remain for a very long time. In practice, they will exist as long as there are different states with different economic and political interests. States will never give up their national money.