集中投资和分散投资，哪一个更适合普通投资者？

Group 1 - The article emphasizes that concentrated investment is a game for a very small number of talented individuals, while most investors find it easier to make money through diversified investment [4][27]. - The success probability of diversified investment is significantly higher than that of concentrated investment, as many successful institutions rely on diversification rather than concentration [5][7]. - Concentrated investment requires finding and understanding good companies, which is a challenging task due to the dynamic nature of companies and the difficulty in evaluating their value [10][11][13]. Group 2 - The process of concentrated investment is much more arduous than that of diversified investment, as it involves enduring significant losses and making tough decisions about buying and selling [16][18][20]. - Most investors can earn money more easily through diversified investment, which does not require the same level of talent, discipline, or extensive research as concentrated investment [26][27]. - The article introduces a personalized investment tool called "Three-Factor Method," which helps investors achieve their risk-return goals through diversified investment strategies [30].