There will always be mentally ill people. I don't know what is meant by "crash." This isn't the stock market (although I did find the 2nd post making it like a Jim Cramer report very funny). There will always be a need for mental health treatment so long as there's people.
If anything there's a nationwide shortage of psychiatrists and even if more people apply into residencies, it's not like that increased number will affect the number of licensed/practicing psychiatrists for years. Further it's not like the number of residencies are then increasing dramatically to accommodate the increased number of applicants. There's still open spots. If you have a field where there's not enough applicants, open spots after MATCH, and more people apply, that doesn't translate to many many more psychiatrists available for practice for even years unless the number of spots significantly increases. If the number of spots remain relatively static it'll just mean psych residencies become more competitive, doesn't mean there'll be more out there.
But getting onto an interpretation of "crash" from my own perspective, I personally believe MDs (not completely, but will be decimated in need) will become obsolete within the next 100 years. Why do I say this? IBM's Watson was able to not only beat Jeopardy champions, it was able to take in medical information completing a medical school curriculum in months.
Yes of course it can't do a physical exam, but it can do a heck of a lot of stuff that will make several MDs not needed as much.
Computer maker says Watson can speed diagnosis and help doctors make better treatment decisions
www.cbsnews.com
Mind you the above link is from 2011!
Also frankly, I personally think Watson would do a better job than some physicians I've seen in practice. Now take in that processing speeds double every 18 months, extrapolate that and IMHO within years to decades you'll have a Watson able to outdo several MDs.
Just as truckers will at some point be replaced by self-driving trucks, I believe the same will happen to physicians. A large impediment to this is simply that people won't feel comfortable about it. Just as self-driving automobiles will one day be common, there'll be a generational backlash against it delaying it for years, but it will happen.
When it gets to this point in time I wonder just what will happen to humanity. A human population that doesn't work will be a population without a sense of purpose. Automation will eventually take away jobs even from those that use their brains, not just the labor force. Reminds me of the sci-fi novel-series Dune hundreds of years before the story actually begins. Humans got technology to the point where none of them needed to work. Computers took over. Then computers decided humans were no longer needed and humans being in a cultural state of no self-regulation, and no self determination were easy prey. (Thus then it started killing humans, humans fought back and it was called the Butlerian Jihad, computers were banned, religion again became a major force, a new monarchy is established, thus starts the story of Dune, a future with future technology but no computers, and with a monarchial government).
I've noticed that among people that are wealthy and don't have to work, it's very mentally unhealthy unless that person can find something to invest their time into that they find meaningful.