This book is for you if you are the kind of person who asks a lot of Why? questions. Why did humans invent money? Why do we need to pay interest when we borrow money? Why are so many people trying to sell me insurance linked investments? Why do experts suggest investing in stocks when the prices swing all over the place? Why do some swear by index funds, while some suggest real-estate? Why do they present historic data to support their products while also saying past performance is no guarantee of future returns? Why are so many people investing in cryptocurrency? This book will help you understand several basic concepts and provide you a framework to reason from first principles so that you can ask and answer such questions on your own.