If you are a trader, you may trade (buy and sell) every time, to get or earn profits through trading.
But, if you are a long-term holding, this may be a good time to buy because the market is still dropping. However, you may need certain strategies to face the future drop again. Some people are using DCA system for holding. This will help you to get the chance to collect more coins for the future.
But, you must also understand what kind of crypto you ar better for holding or trading, because not all cryptocurrencies are suitable. Bitcoin is the best one, for long term holding is also very aluable.