I think it's better to wait rather than selling the valuable bitcoin at low price due to panic selling.The people in this forum ask you to wait for your future.Because we know the price of bitcoin again reach 19,000$ in a couple of months.At that time you will feel for the bitcoin which you lost by selling at low price.
It depends upon the situations of the price value of bitcoin when the price value of bitcoin incounter droping in a very low price. Then its better to hold bitcoin instead of selling it. Because the price value of bitcoin is volatility, so we just wait until the price will grow high and sell it in a very high price. In dealing with this situation we should apply patience and strategies in order to gain more profits.