Most people who panic are those who are new in trading. I think most of us experienced this panic when we are noobs. I myself panic almost every dip when i was new. But experience and a believer on what bitcoin can do makes me more confident on holding. Lack of research will cause panic. If you have full knowledge of what bitcoin is, then it will not make you panic.
Yes, only experience that makes people do not panic. if they know, actual cycle bitcoin annually almost the same. always down and up. But behind the decrease in normally, it will rise very high. We can see in every early year, bitcoin has always experienced a decline, but the next few months ultimately rise very high. so don't ever panic, because bitcoin is long term, not short term.