为什么要买基金？这个问题涉及到许多方面，包括投资者的投资目标、基金的种类和特点，以及基金与其他投资产品的比较优势等。下面我们来一一解析。

首先，买基金可以帮助投资者实现分散投资。分散投资是一种常用的投资策略，可以降低投资风险。通过购买基金，投资者可以将资金投入到多种资产类型中，如股票、债券、商品等，从而分散投资风险。英文翻译为：The first reason to buy funds is to achieve diversification. Diversification is a common investment strategy that can reduce investment risk. By purchasing funds, investors can invest their money into multiple asset classes such as stocks, bonds, commodities, etc., thereby diversifying their investment risk.

其次，基金可以由专业的基金经理进行管理，为投资者提供专业的投资管理和风险控制。基金经理具备丰富的投资经验和专业知识，能够根据市场变化和投资者的风险承受能力进行投资组合的调整和优化，以实现最佳的投资回报。英文翻译为：The second reason to buy funds is that they can be managed by professional fund managers who provide investors with professional investment management and risk control. Fund managers have extensive investment experience and knowledge and can adjust and optimize investment portfolios according to market changes and investors' risk tolerance to achieve the best investment returns.

此外，基金还具有较低的投资门槛、较为灵活的投资方式和较为丰富的投资选择等优势。对于一些初入投资领域的投资者来说，基金是一个很好的选择，因为它可以帮助他们降低投资风险，同时也可以为他们提供更多的投资机会和选择。英文翻译为：In addition, funds have lower investment thresholds, more flexible investment methods, and richer investment options and other advantages. For investors who are new to the investment field, funds are a good choice because they can help them reduce investment risks while also providing them with more investment opportunities and choices.