In life, it's all about the cost-benefit ratio.

Regardless of whether it's good or bad, I have come this far by considering everything in terms of cost-effectiveness.
For example, a pay raise. How much effort is required for that...? I often used paid leave to participate in seminars on weekdays. As a result, I gained various experiences and knowledge, leading to increased income in both side jobs and main jobs.
For example, investments. Initially, I used to look at Shikiho, Mosate, news sites, etc. However, once I developed a method that can win without looking at such things, I stopped considering the cost as well and stopped looking at anything.
Choose the option with the best cost-benefit ratio. I also believe that it is essential. While there may be valuable sacrifices, the fundamental principle is to invest time where it is effective. Life may seem long but is short. One should use their time effectively.