Valuable Currencies In The World is a simple application for Windows 8. The moment one hears the term 'Currency', a U.S. dollar floats before one's eyes. This is so because the U.S. dollar rules world trade and so it is always in limelight. But did you know there are other currencies which are even more valuable than the U.S. dollar? Here are top 10 most valuable currencies of the world. They are ranked according to their value against dollar. Even though they stand to be most valuable, it does not mean that these currencies have better investment options or that it represents good economic health of a nation.