We are long past the days of selling bitcoins in a panic, though the world has not yet adopted it, the relatively few adopters have come to trust the system.
i hope you are right but people are still panic selling their bitcoins form time to time in order not to lose their money if the price is going to be dumped
If you see prices are going down than it is good practice to sell any product which you already made some profit and can buy later at a lower price instead just keep looking at prices. I also usually follow this method and save I only small amount of BTC for long term appreciation. I sold most of my BTC above 670 level and waiting to start accumulate around 600.
It is difficult to get the timing right. So I do not trade the bitcoins. I just buy the bitcoins when the price is low and then hold.