Bitcoin is possible in physical form like Casascius Bitcoin which contains the private key of an amount of bitcoin but government will not make such project to move forward.
I will agree with you, in as much as bitcoin have the potential of being a main currency or note for transactions, the reflection of it's decentralized nature can give us another thought. For bitcoin to be a hard currency, certain process needs to be considered. It will be controlled by central banks and government, it must be generally accepted worldwide, bitcoin price will be stable due to high rate of adoption etc.
All we need is to know more about bitcoin, knowing how well to use it easily and also create awareness in educating others with insufficient knowledge about bitcoine.
One uniqueness of bitcoin is it's decentralized nature so making it a hard currency will rather ruin bitcoin, It is better off a digital cash.