During the bear market, most coins fall very low, even lower than expected. But if you are able to hold your coin during their time, you can sustain all the hurt that comes with crypto when price falls.
On the other hand, the bear market, which lasted more than a year, showed that in many cases, simply keeping coins and tokens is ineffective for profit. It is necessary at least in moments of significant rises or descents in the price, respectively, in part to buy or sell our cryptocurrency.