Joining a public Telegram group carries no risk to your wallet or device by itself. The real risk in crypto groups is social engineering — unsolicited DMs from fake "admins" offering deals after you join. Altcoin Astronaut is listed in our directory, but the rule applies everywhere: never respond to DMs from unknown accounts after joining any crypto group. Your phone number is never visible to other members unless you've made it public in your Telegram privacy settings.

No. Telegram never notifies your contacts when you join or leave a group. Other members inside Altcoin Astronaut can see your username only if you post — your membership is not visible to anyone outside the group.

Altcoin Astronaut is a Telegram group for anyone interested in altcoins and cryptocurrency. Members can expect regular discussions on investing and updates, along with announcements to learn more about.

We verify every listing is publicly accessible, has a minimum member count, and exclude groups Telegram has marked as harmful. Altcoin Astronaut currently has 512 members, last verified 24 May 2026. If you've joined Altcoin Astronaut and noticed something suspicious — a review on this page helps others stay safe.