official cryptocurrency means that government takes part in bitcoin. I don't think people will like it because government might make regulations or even tax for the user and it makes the users feel they are being constrained. the result, however, is many people are lack of interest in bitcoin.
If at all the Government will even allow it to be of the reach of me and you,because BTC will be an essential commodity,making investors lost interest because of the heavy Taxes they will impose on it its transaction.