If someone buy a coin at a certain rate and after which the coin drops, that's shouldn't bother you though it depends on the coin you bought cause if it is a shit or memecoin  then it is something to be worry about because most of those coin whenever they drop they don't appreciate easily and most will never appreciate again but if it is Bitcoin you invest in there's nothing to worry about cause even if it drops it will definitely appreciate. However, when buying shit or memecoin you ought to be very careful before you dive into it cause it can be annoying at times and sometimes sweet when your analysis is being done correctly.