Should I worry about a market crash?

I am 61 years old and I have $180,000 sitting in my company retirement plan. I am planning on working until I'm 66, but I keep hearing on the news that the stock market is due for a massive crash soon. If the market drops by 30% next year like it did back in the day, does that mean my $180,000 instantly shrinks down to like $126,000 right before I need it? Should I move all my money into a safe bank CD right now, even if it doesn't grow very much?