Money may rule the world, as the song says. And probably most people in the world deal with money, many of them on a daily basis. But despite their close familiarity with it, few can say exactly what money is and what role it plays in the modern economy. This book provides a brief history of the origin, functions, forms, and types of money, the elements of the monetary system, and the mechanisms of money circulation. It also examines the moral, ethical, and economic aspects of credit transactions and issues related to loans. It analyzes the reasons confirming the hidden danger of using interest rates in banking operations and presents the opinions of scientists and specialists on the need to abandon loan interest. It reveals the prospects for the development of interest-free loans in Kazakhstan. The book is intended for a wide range of readers.