GM (or gm) is an abbreviation for "Good Morning" and is regularly used as a social greeting to foster a sense of connection and camaraderie within crypto communities. While ‘GM’ has close ties to crypto vernacular, it originated before the emergence of crypto communities.
People regularly start their day with a GM message, and other community members then respond with a GM reply. Its use within the crypto community reflects the inclusive and collaborative nature of the space. It's a way for members to show respect and acknowledge each other as they begin their day of exploring and discussing the ever-evolving world of cryptocurrency.