The answer depends a lot on your personal circumstances, time horizons, whether you're trading for fun / extra cash or to make a living etc.
If you're a long-term investor and have confidence in the quality of your holdings, then a bear market (defined as a 20% drop from the highs) is usually a great opportunity to top-up (personally I would do this by drip-feeding into the market slowly as it's impossible to be sure when a bottom has been reached).
If you're a trader then market crashes and the associated volatility usually throw up lots of good trading opportunities but easy to get burnt if you don't know what you're doing. I always think of crashes / bear markets in this way...as scary as they can be, they're actually (eventually!) the beginning of the next bull market, as the Covid crash of March 20 proved to be most recently - best buying opportunity in many years.
As you're relatively new to trading I would highly recommend reading 'The Disciplined Trader' by Mark Douglas. Expensive to buy usually, but well worth every penny. Hope this is all of some help to you.