Like philately, coin/banknote collection is also considered as hobbies of rich people. There are several ways to collect coins and banknotes of the world. It all depends on what you want to collect. You can start with the coins in your pocket. At home leisurely go through the coins you have, you will be amazed with the types and varieties. You can acquire coins of the different countries through pen friends or from the relatives you know staying abroad. There are several websites where you can actually exchange your coins. It is fun collecting coins and you will really enjoy it. Like philately it will also expose you to the world history through its varied forms.