Let them panic; other, more relaxed traders will make good money on them. And those who panicked will get experience, which is also important in trading.
If they panic sell, it will still have its own negative effect on the market, even if others will make money on them, it will still create a dump market, if we take a look at most of these altcoins that get very low value when they enter exchange, it is because of lack of trust the investors have that makes them to dump the coin once they see a little increase in the price when they enter exchange rather than holding on to that coin for future so that the project can have time to pick.
This time of the market, we need more of buyers to enter the market and not more of sellers; we cant afford to lose more holdlers or buyers now.