What make people panic sell?
Panic makes people panic sell.
Generally it can be because they are newish to crypto, and have never experienced a price drop before, they are unaccustomed to what is often quite large volatility, and the uncertainty amplifies their concern beyond what is reasonable.
But it depends on the coin. If they are backing some low-cap low-volume alt that has suddenly gone x100 in price for no discernible reason, and then started dropping, then panic-selling might be a perfectly rational response.
This is true, if the person has not experienced a downward movement before, he would certainly panic sell. And mostly, those are newbies in the market. However, it can happen also to old timers, if they are holding some alts which suddenly drop its price, where they are hoping to gain good amount of profit. And if they see that the project doesn't have much reason to exist, in short, no solid application in the market. They would panic if the trend is in continuous downward motion, because normally, it would not go up again. Most projects with this kind of performance are those pump and dump coins, crap tokens/coins, hyped up coins. Newcomers as well as old timers panic sell when they are holding those coins.