Of course, we can use Yi Jing in fortune-telling and various type of predictions e.g. market forecasting.
The Yi Jing is the grandfather of all Chinese knowledge and skills. The 64 diagrams found within the Yi Jing is the actual symbols describing what occurs in nature. We should fully comprehend the knowledge hidden within these 64 diagrams, so that we can achieve a deeper understand of nature and the different aspects of human society, and thereby easily achieve success in the society.