What do people who climb mountains outdoors all the year round make a living? What occupations do they usually do?

According to my understanding, it can be divided into the following categories:

People who are addicted to their major and retreat from it can only earn living expenses by browsing or other means.

People with high income or some substance precipitation may eventually become addicted, but they don't have to worry about the cost of living because of precipitation. It just needs to be allocated.

Middle-income or high-income people generally allocate their lives and hobbies well, such as going hiking or exercising regularly every week or year.

Specific employment is varied. I can't tell, everyone has low income, high income and rich.