First, Bitcoin not crypto.

Second, not just Bitcoin. Check out different hashtags.

grownostr is one hashtag attempting to grow it beyond Bitcoin.

Nope! Lots of Bitcoiners are here though, because Bitcoin developers built Nostr. You don't have to be a Bitcoiner to use Nostr though.

Check out #foodstr, #dogstr, #catstr, #coffeechain, #beerstr, #grownostr, and other hashtags.