Investor, 66, seeks advice on investing $100K in S&P 500 amid market gains and age concerns

A 66-year-old investor with no debt and a home is considering investing $100,000 in S&P 500 index funds for 5-7 years. She already has 50% of her portfolio in the S&P 500 and consulted a financial adviser who supports the move but cautions about potential market drops. The investor is aware that a significant market decline could be risky given her age and limited time to recover. This highlights the importance of balancing growth opportunities with risk tolerance, especially for older investors.