Bitcoin is world wide meaning it can be used all over the world. For example there are people who are accustomed to travel and have bitcoin, this will facilitate the exchange of money because the spread will be easier. The purpose of bitcoin was created to avoid a system of restraint ranging from political and monetary intervention. But bitcoin and other digital currencies so far have not been a strong competitor for cash in some countries like in Indonesia. But I am sure one day we can achieve that in the future.