This is the time of Bitcoin selling. Maybe the Bitcoin can come down again because sometimes the Bitcoin gives you a surprise. Today bitcoin prices are going down but not more than enough, which is good for some people and some people don't have with this.
If you did not sell when bitcoin price was at $30,000+ is now that the price is battling between 26,000 and 27,000 that you want to sell, instead of making some gain, you might end up losing some money on the process of selling now, this the kind of panic selling which traders and holders are warned upon, when you panic sell because of your fear for price dump in the time to come, you lose some money which you could have earned by just being a little patient with the price.
And anytime you sell off some bitcoin, you lose the chance of recovering what ever lose you incur due to the negative price change, as long as you hold you bitcoin and don’t sell, you will gain back what ever lose the dip market might make your portfolio experience.