As maia said, it's not really about trying to time the market down to the year (or even trying to pinpoint it within 5 years)... but rather picking up on trends and trying to invest your time in the right places.

I started teaching the basic concepts after working with so many clients who had painted themselves into a corner by creating a great career in a dying industry. Some examples of industries for which the writing was on the wall: -Print Journalism -Almost any US manufacturing job, especially textiles. -Projectionists

I suppose those are all jobs/industries which declined due to technology, although the example of technical manufacturing of computer hardware shares many similarities to programming/coding jobs today.

Here are a few jobs which have declined due to commoditization(is that a word?) of the knowledge: -Typists -Data entry specialists -Computer Operators

Those are just the ones that have recently (past 15 years) continued to decline as skills have gone from specialist to commodity. If you go further back, you'll find similar examples for most new technologies that initially have high pay for specialists who operate it, but which becomes very cheap to learn.

And here are some of the jobs and industries which, if my clients insist on taking them, I recommend they leverage to another job title or industry as soon as possible: -Social Media/Community Manager -Programmer -Anything print journalism