It's long overdue. According to at least one expert, we are already in recession:
https://steemit.com/money/@tarack/are-we-now-in-a-recession

Were it not for continued central bank intervention that keeps pushing it forward, we should have had the much needed correction. But natural cycles cannot be delayed forever. Check this article out on Kondratiev Waves:
http://goldsilverintel.com/financial-winter-nearing/