Bitcoin is not yet the global currency because it's not used by the major part of people worldwide, but i think it can potentially being the first used currency soon
For now, yes you are right. Because there are still many people who don't know about bitcoins. But i think someday when bitcoin become more popular, i'm sure people will use bitcoin for global currency.
yeah the interest of people in bitcoin is growing at an increasingly rapid pace right now i hope that it will not stop
i think bitcoin will grow more and more and never stop, i think thats the only correct way now