[mythrwy]

Really depends on the person. Learn something though, as many things as you can in as many areas as you can. You never know what might pan out.

Most important thing: Learn to make things happen. Learn to "do stuff". A lot of people never understand this is what people pay for (they think it's just their qualifications or some such).

Learn how to take a task, stick with it and make a result, even when it is hard. Learn how to work. How to deal with other people who can help you or are in your way. Learn how to learn on the fly.

I don't know what the future is 20 years out, nobody does. Any specialized skill might go by the wayside at any time. But what you gain acquiring mastery of a skill is a skill itself.