股票涨的时候买，还是跌的时候买？

Core Insights - The article discusses the criteria for identifying stocks worth buying, including the timing of purchases and investment strategies [1] Group 1: Stock Selection Criteria - The article raises questions about what characteristics make a stock a good buy [1] - It emphasizes the importance of determining the appropriate purchase price for stocks [1] - The article suggests that investors should consider whether to buy stocks when they are rising or falling [1] Group 2: Investment Strategies - The article explores different methods for purchasing stocks and constructing a diversified investment portfolio [1]