Bitcoin is the most popular currency online and no one can doubt it, however, when it comes to currency offline no one can outdo fiat or real money. In my own perspective, I think that bitcoin will never be powerful than fiat even years or decades may pass since we all know that the world governments will never allow currency that they can never controlled. As I said, bitcoin will never over take the power of fiat but maybe, just maybe, another cryptocurrency will be created in the future that even the government will accept it as the world currency.