Given our recent highs, a correction or negative trend is most likely coming up in the next six months. Obviously nobody can predict the market correctly, but that's my opinion.
Given the market indicators it would not surprise me if a correction is on the horizon. Will it be a true bear market? Nobody can say for sure. Or we could continue to experience major gains for the next few years, who knows?
If you're worried about your investments, the best thing you can do is evaluate your allocations to ensure they are appropriate given your goals and the market outlook. Since I can't predict what the market will do, I give much more weight to my goals and select my investments accordingly. I'm still relatively young so my portfolio will consist of mostly stocks for a long time regardless of what the market does. I can tolerate the volatility for now.