Fear of missing out (FOMO) is the feeling of apprehension that one is either not in the know or missing out on information, events, experiences, or life decisions that could make one's life better. FOMO is also associated with a fear of regret, which may lead to concerns that one might miss an opportunity for social interaction, a novel experience, a memorable event, or a profitable investment. It is characterized by a desire to stay continually connected with what others are doing, and can be described as the fear that deciding not to participate is the wrong choice. FOMO could result from not knowing about a conversation, missing a TV show, not attending a wedding or party, or hearing that others have discovered a new restaurant. FOMO in recent years has been attributed to a number of negative psychological and behavioral symptoms. - WIKIPEDIA source: en.wikipedia.org/wiki/Fear_of_missing_out
FOMO is something every trader must guard against. It is necessary to control emotions and not be taken advantage of by them.