Why we should have more than one Professional Knowledge & Experience ? Multiple doors of opportunities!

Multiple doors of opportunities! It has always been a topic of debate "whether you should only go with the One Specialized Field of Qualification/Experience so that no one can ever replace you or should have multiple options of Experiences in different Fields.". Let's discuss this topic. Every person has their own beliefs so our thoughts may differ in many places during this article. So, advise you to think accordingly. We gained lots of knowledge and Experience in specified fields such as Accounts, Finance, Taxation, Technology, Sales, Healthcare, etc. We mastered the field in such as way that no one can replace us. When someone introduced the Radio for the first time, has he ever thought that one day a small device with the size of 100 grams could hold all the features of a Radio with thousands of other advanced features? Has anyone ever thought that the process of manual activities can be transformed into automation? Those who thought that I would master some areas s...