Long-term investing allows compound growth to work in your favor, potentially turning modest investments into significant wealth over time. For example, a $10,000 investment growing at 8% annually would become approximately $22,000 after 10 years, $47,000 after 20 years, and over $100,000 after 30 years. By focusing on company fundamentals rather than price movements, you develop the discipline to hold quality assets through market volatility. Studies consistently show that investors who maintain a long-term horizon outperform those who frequently trade in response to market news or emotions. According to Dalbar's Quantitative Analysis of Investor Behavior, emotional decision-making typically reduces investor returns by 3-4% annually compared to market averages.