I believe that it is best to act according to the situation. It is necessary to determine the best time to buy coins and then watch how it will behave.
Yes, there is no certain decision here. Today, the market shows both bearish and bullish signs. You can keep holding if you are sure that bulls will win. However, day trading makes sence also
but if we trade daily we must always be clever in looking for opportunities and know when we can sell our coins appropriately for profit because now is the lowest price of bitcoin and that is our challenge to always be ready every time.