Here's a CoC:

1. Absolutely no shitcoinery. This is a bitcoin maximalist instance.
2. Get triggered. Help yourself to the peaches in the freezer.
3. Use your common sense. Don't do crime here. Read the room. Act as you would in your own citadel.

Other Bitcoin Mastodon instances:

Check k3tan's relay page for an updated list of bitcoin mastodon instances.
social.k3tan.com
freeside.online
bitcoinhackers.org
social.raidarou.com
thecitadel.social
bull-session.nicebit.net
hodlr.one
himk.am
birdstate.bitcoinenemies.com
ctdl.co
mastodon.petertodd.org
utxo.id
bitcoinplebs.net
bitcoinersagainst.boats
x0f.org
bimmer.social
nakamoto.social
social.nolim1t.co
hafkehafke.org
mcrypt.com
nickslaney.net
lancasterpa.social
zoomers.lol
galacticpatrol.masto.host
mastodon.enkitunes.com
newcitadel.net
bitcoinlizard.net
mstdn.xpub.one
social.mamushi.io
hash.social
whynot.hostyourown.tools
hodltech.com
unstoppablecode.org
crypt.shedsys.space
tryliberty.org
social.btcpins.com
social.bitcoiner.guide
theolddude.masto.host
bitacadie.com
pub.satoshifi.org