But that doesn't mean that it's going to be valued by the market. If it's not valued by the market, the fact that it's rare doesn't help you.
For a high market price, you need the intersection of a scarce skill (low-supply in labor market) that provides value to other people (high-demand in the labor market). Being a good software engineer is an example - low-supply and high-demand, therefore high wage/salary.
