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.