How much will S&P be worth in 10 years?

Considering the current market trends and historical performance of the S&P 500, can we reliably predict what its value might be in 10 years? Will factors such as global economic conditions, political stability, and technological advancements play a significant role in determining its future worth? How can investors navigate the complexities of forecasting the long-term trajectory of the S&P 500, given the inherent uncertainties involved? Is it advisable to make long-term investment decisions based solely on speculative projections of future market performance?