Two letters all over social media started as a jolly greeting among cryptocurrency fans and went on to inspire a new virtual currency, real-life tattoos and, naturally, online squabbles.

The catchphrase “gm”—or, to put it the old-fashioned way, good morning—is increasingly popping up on Twitter, Telegram and Discord channels, often alongside images of surf, sun-dappled flowers and sunsets.

The abbreviation is more than just a pleasantry for people who embrace blockchain, the technology underpinning virtual currencies like bitcoin. Blockchain enthusiasts are using it to signal that they are early to a technology whose future they believe is bright.