If I were to continue building my skills, what kind of skills should I learn in order to keep myself valuable in the market?

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I personally think that computing skills are extremely important with technology being so advanced these days, so try to take more computing courses to upgrade your technology skills. For example there are many businesses offering courses on Microsoft Excel which a shocking amount of people do not know how to use properly. Even though COVID 19 has caused most of these classes to be stopped for the time being, I am quite sure that they have online classes that are still being carried out. Hope this helps.