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Newsletter

One calm letter a month – instead of price alerts and push notifications.

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Once a month. Unsubscribe at any time. Ages 18 and over.

Pre-launch Sign-up opens once our mailbox is running – until then, no confirmation email would reach you.

Double opt-in: you will first receive an email with a confirmation link. No open or click tracking.

What you get

  1. One email a month – never more.
  2. What has really changed in Bitcoin, regulation and tax – put into context, not hyped.
  3. New articles and tools on Blockchain21.
  4. A security tip to keep your bitcoin safe.

What you won’t get

  • Price forecasts and “buy now” emails
  • Your address passed on to third parties
  • Tracking pixels or click tracking

How sign-up works

  1. Sign upEnter your email address and confirm your consent.
  2. ConfirmYou receive an email with a link. Only then are you subscribed (double opt-in).
  3. ReadOnce a month a calm letter arrives in your inbox.
  4. UnsubscribeAt any time with one click via the link in every email.

Advertising in the newsletter

Occasionally we mention offers from our partners in the newsletter. Such mentions are always labelled as advertising – just like on the website. How we are funded is explained on How we are funded.

Privacy at a glance

  • We store your email address, language, the time of sign-up and confirmation, the version of the consent text and, as proof, a hash of your IP address (not the address itself) – on our own server.
  • Our emails contain no tracking pixels, and we do not measure which links you click.
  • We do not pass on your address. After you unsubscribe, we delete it within 30 days.

Full details are in our privacy policy.

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Pre-launch

We’re still building – block by block.

Blockchain21 is already open, and you’re welcome to look around. We haven’t officially launched yet, though: some details are still missing, may change or don’t quite fit together yet.

Not finished yet

  • Email Messages to support@blockchain21.net don’t arrive yet. Until then, you can reach us by post – the address is in the legal notice.
  • Newsletter Sign-up opens once our mailbox is running.
  • Reader account Coming later. Until then, your browser keeps your progress.
  • Partners No partnership is active yet – providers are listed without ads.
  • Info pages The privacy policy, transparency page and “About us” still lack some details.

Already in place: learning path, articles, glossary, calculators and live data.

Block 0 · Genesis — Bitcoin, too, began with block 0 As of 5 October 2026