So as far as we know BTC currency is growing wide, do you think there will be when it become a national currency?If yes, why?If not, why?
No, I'm sure it could never be the currency of any country since its value always changes with the market so this certainly does not happen.
Bitcoin as a national currency is not found around the world, but in specific I find Japan to be the only country that has given importance to bitcoin similar to the national currency. Soon on understanding the growth the country experiencing through bitcoin more countries will give importance similar to their own national currency.