The rare skills and knowledge that are directly applicable to your own life through being a human. Medicine, fitness, sex, motivation, rationality. The more money you have, the more you can farm things out, but you're still left with the problem of judging which farmer to employ, which requires some knowledge on your part.
Hey everyone I just read this, which in turn lead me to this and I'm curious as to what are some skills and fields of study that people think fit the category of 'rare and valuable'.
Not just in white collar environments either, but also considering the entertainment industry, hospitality, trades and so forth.
I've noticed anything that involves interfacing tends to have good dividends, especially if you can freelance.
Would love to hear your thoughts.