More and more talking heads are predicting doom and gloom for 2016 http://www.cnbc.com/2016/01/15/a-recession-worse-than-2008-is-coming-commentary.html I always feel like when everyone's doing one thing then it's time to do the opposite. This is probably a TERRIBLE time to sell and a great time to buy.
Now you're on to something. Most of the money is made once a market has crashed, when everyone WANTS to sell, and most people wish to hold onto whatever money they have, therefore only particular people would be "brave" (read:smart) enough to buy at such a time. It usually takes someone rich enough to be willing to do such a thing, but it has happened time and again. If you know (which is a whole different thing to "believe") your stocks are solid and in places of little volatility, then stay there. If you think there are question marks, then get them somewhere that could outlast a financial crisis (i.e. not financial stocks like currencies, banks and financial institutes etc).