it's a system that is only 2 years old and infrastructure still needs to be built before it is considered ubiquitous. But the potential convenience of using Bitcoin exists today. I can tell you that in the US, I can deposit cash in a local bank and receive Bitcoins within 2 hours. Soon, I hope, it will be the same in Yemen and all places around the world. I suggest that you network with people and think creatively when trying to obtain and use the currency. For instance, you could buy something for a friend via his amazon wish list using your credit card and he could send you bitcoins for buying his wish list items.