Hodl means to hold the line, don't sell. What started out as a typo of the word \"hold\" in a late-night message board discussion from the dark ages of 2013, has since turned into the mission statement and trading philosophy, and investment strategy for many cryptocurrency traders. The term describes holding onto your cryptocurrency for the long-term and never selling along the way, even when the market turns volatile and prices start to drop
Example
“When Bitcoin crashed 50% from its all-time high, long-term believers posted 'HODL' across social media, refusing to sell and trusting in Bitcoin's long-term value proposition.”