I hope you don't be greedy and take a profit if you think that you can make a profit. If you are still holding bitcoin, maybe that will be a good decision, but don't forget that the price will fluctuate and you need to calm down. We already see $18,400, so maybe you can sell bitcoin when the price can increase to $19k because the $600 gap of the price will give you the profit, so you can wait for a while to buy back Bitcoin at a lower price. But that will be up to you.
See I tried to comprehend that bitcoin price is not constant and is not what someone can depend on because of it's regulations in price, what i will like to render as encouragement is that whoever that want to make excessive benefit due to the increments in bitcoin currently should wait until it get $20,000 which bitcoin price is approaching to get their, but for those who are inquisitive can move forward to sell in order to make profit.
With the price now is down, we need to stay calm and don't panic because it is not over, and the price will be increased again. People already sold their bitcoin at the current price while they are also waiting for the next correction, which could happen now. But behind this correction, the price will get another chance to increase back, and I think that could break $19k and to increase more.