Bitcoin has already become a global currency, It did this when it was trading on the Stock markets, yes as a stock, but also as a currency if you look at the stock exchange you have all currencies traded, and then the commodities market is also Bitcoin. so it is in all levels of trade, and currency exchanges, this is what keeps it strong, and will make it stronger for days to come.
I think at this time yet. because bitcoin only well-known and popular on the internet, but the internet paypal also well known, and could even be said that paypal is the toughest rivals of the bitcoin. before conquering paypal, bitcoin has not been the best on the internet. laymen know about paypal but not with bitcoin. so I guess after bitcoin after the internet, and came out as paper money in the real world, then at the time that bitcoin will be recognized as a world currency, but this is just think
