You're not obligated to work for the same employer your entire career. Nor is an employer under obligation to keep you indefinitely. Free agents are self reliant and motivated to achieve full career potential. They choose not to coast in their job relying on an employer. Extrinsic skills are learned, cultivated and mastered over a period of time.
Intrinsic skills are inherent character traits of a person such as honesty, dedication and morality.
Try this exercise to define your skill set. Make four columns with an extrinsic skill listed at the top of each column. List specific skills you have related to each category. For example, under working with things, list your abilities in using certain tools including car repair, house improvement and crafts. Include your athleticism as well.