FOMO, an acronym for Fear Of Missing Out, refers to the feeling of anxiety or fear that individuals experience when they believe they are missing out or being excluded from a particular event, social circle, or opportunity. 

The term is frequently used in the cryptocurrency community to describe the fear of missing out on profits from crypto assets that are anticipated to increase in value, or conversely, the fear of losing value from holding onto a crypto asset that is expected to decline in value. 

In FOMO situations, investors may take measures such as transferring their assets to cold storage or wallets to avoid missing out on potential profits, popular tokens, or critical market indicators.