Bitcoin has power because its benefits and functionality are recognized by various parties and countries, safe and fast is one of the advantages bitcoin, at this time people need security and speed in the transaction, that's why bitcoin is needed today
I don't know why but it's functionality is not that much. Fast in transaction? I think that was years ago and bitcoin is not that used by the people so I think bitcoin is not that powerful as we know it, there are many people who don't know bitcoin, they are getting attracted to it's price that is why they use it. If bitcoin has power, I think bitcoin will be stopped by the government because it will be a thread to them. Also it has a good price so I think the bitcoin don't have the power but the fiat that you get when you sell your bitcoins.