The term 'HODL', now synonymous with a popular Bitcoin investment strategy, originated from a 2013 Bitcointalk forum post. A user, reacting to a 39% Bitcoin price crash, misspelled 'holding' as 'HODLING', inadvertently coining a term that has since become a rallying cry for long-term cryptocurrency investors. This phrase encapsulates the strategy of holding onto Bitcoin through market volatility, emphasizing patience and resilience.