It is your dilemma, how to tackle with this problem of specialization and diversification. It depends upon the following factors: your personal interest, your educational level, your actual needs and necessities and your financial position etc.

The gradual change in the significance of the words is the most common factor of the human language. We try to meet the continually occurring needs of expression by using words in temporary deviations from their ordinary senses. And in most of these deviations the new born sense gets the permanence and the primary sense dies out.