Markets will be volatile, but we expect to be compensated for bearing the volatility. As long as we are comfortable with our risk profile and have a long enough time horizon, negative returns will recover (or, at least they always have!!). Accounts with more risk, over time, will out-return less risky accounts.
The book “The Rational Optimist”, by Matt Ridley, goes into great detail explaining how society has historically always figured out how to get past adversity. It is a good read if you are looking for some positive reinforcement in the New Year.