People will start using Bitcoin as a currency in everyday life when the state allows it. At the moment, the states trust in Bitcoin is not yet available. Let's see what will happen next.
And currently, only a few Countries have accepted Bitcoin as a legitimate payment method (currency). I am sure, they are waiting for the digital currency (Bitcoin) to stabilize in value. Because if the value is not stable, they assume this will bring a big loss when using it as a currency.