It is always good to have variety in life. Years ago I studied the coffee industry for six weeks out of curiosity. It is worthy of learning, as it has been the second largest commodity next to oil.
Variety in reading and knowledge helps in discerning underlying value. Being a generalist is good. Having inclinations toward certain interests helps an investor invest.
Reading is an excellent way to absorb facts and information to optimize thinking through whether a company of any kind is worthy of an investment.
The following is an article of interest for coffee lovers and those who may simply enjoy science.
“How Does Caffeine Wake You Up?:” https://www.sciencealert.com/how-does-caffeine-wake-you-up.