Why would you consider holding bitcoin a bad idea just because its price has dumped? hahaha...you must be the new crypto noob in town. This is the perfect time to purchase the dips and hold your bitcoins. There is no point in selling unless you really don't know the sort of investment that you have gotten yourself into.
The price of bitcoin is indeed down, but holding bitcoin now is actually an opportunity to enjoy profits when the price of bitcoin will return high. It is no coincidence that the price of bitcoin is now down, because bitcoin is experiencing a price correction to become a stronger digital currency. So in my opinion holding bitcoin now is not a bad idea, it only requires patience to wait for the price of bitcoin to increase.