I don't know where I read this, but few years ago someone was advising students on what they should do to survive professionally. And the answer he gave was: M

I don't know where I read this, but few years ago someone was advising students on what they should do to survive professionally. And the answer he gave was: Master one field, and that advise would have been enough for past generations. But for the present and coming generations the answer is, master one field but have at least some knowledge of other(2-3) fields that you think(from your general knowledge) are important for humanity; and don't let go of your hobby. This is a not so clear-cut answer because that is the reality we live in, it is a very dynamic and competitive world! So, in today's world it does not help to either be a generalist or a specialist. The ethos should be "Jack of all trades, but master of one"