Maybe not at this moment.There are some factors that need to be considered before making it a national currency.Some countries have bitcoins but not widely used.
You can expect anything to happen in the coming days. There is nothing in this world which is impossible. I think of bitcoin as national currency to be a very good idea. The only thing which matters the most is the role of government in this aspect.
If the government is willing to take positive steps in this regard, then there are likely chances of this thing to happen. This will bring positive impact on society.
Really? I think we have more trouble about society than positive impact on society.
All transactions will create through Bitcoin and no one can knows the source and the person sended or received that amount.
This is really the good thing for anyone wants to use currency for crime.