The concept of the 20 punches approach to investing emphasizes the importance of making a limited number of high-stakes financial decisions throughout a lifetime. By conceptualizing each investment decision as using one of only 20 available 'punches,' investors are encouraged to avoid unnecessary dabbling in the market. This approach fosters a greater focus on making fewer, more impactful decisions, ultimately leading to increased success and wealth accumulation. It promotes discipline and encourages investors to carefully evaluate opportunities before committing their 'punches,' resulting in a more strategic and thoughtful investment practice.