As the demand for a certain type of jobs increase, the amount of people who are willing to supply their labor also increased. Job that are the most stable and has high payment are the types of jobs that high in demand but low in supply.
Personally, I think you should think about supply and demand when determining your career. But, you shouldn't make it your sole criteria.
Salary is important. It's provide safety for you and loved ones to fulfill your basic needs. It also allow you to follow a certain type of lifestyle. But, passion and happiness also extremely important. You need to make sure that the job that you do is not taxing your general well being. You need to find balance between the two.
