Yep, in some meaning he was right. There were already several crises since that time. The key poing that the market crash (for example like the one we had back in 2008) are a result of accumulation of various negative things during the pretty large period of time and it usually blow up after the global market frenzy. Some stock investors say that untill you hear those warnings about the market bubble then this bubble is still on the half way till it blow up.
This time everything is pretty much the same. Stock market is bullish for several years in a row and this year is still supposed to be a bullish one. Many people will agree that bubble is forming on the stock market right now but no one can tell the exact date when it blow up.