People will always be afraid of what they don't understand, which is why they don't take your advice seriously. They look at the dip as a positive thing for their funds, and the only thing that's running through their minds at that moment is how to stop losing, with the belief that "it's better to lose little than lose all trying to recover what has already been lost."
 
forgetting the fact that as long as you hold your coin strong, it will only be a matter of time. Whatever amount was sliced out of the worth of their holding will be replenished as soon as the market starts to recover and the price reaches their buying point. It's just a matter of time.