Of course, Bitcoin can be a world currency. However, Bitcoin is not valid in all countries. But seeing the popularity of Bitcoin,it will be the world currency for a time.Only the bitcoin has been known in all the countries, which could not make any other coins.Everywhere they are Bitcoin,world Currency Will be.
i don't care whether the government recognizes the legality of bitcoin . more and more people hold bitcoin . its value has always existed . the meaning of currency is that people are willing to use it . i believe it will become the world currency