The article explores how different people's attitudes towards risk affect their decisions in the stock market. By using a model that considers both fundamental analysis and trend-following strategies, the researchers found that individuals with varying risk preferences make different choices when predicting stock prices. This diversity in expectations can lead to unpredictable market fluctuations, even without external influences. Additionally, small random changes in stock prices can cause larger bubbles, and the traditional approach of a single representative agent cannot fully explain these dynamics.