Just few minutes back I got some flash idea in to my mind and it was about using same currency all over the world. I was thinking about the impact of US dollar fluctuations on fuel price and on many other products. Do you think concept of one world, one currency is best solution for currency fluctuations all over the world. I personally think concept of Unified Global Currency may help developing & under developed countries who suffer a lot relatively due to currency fluctuations especially of US dollar. Update: It seems it was already discussed in Google but not in HubPages.