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Bitcoin Is Not Crypto – Why the Difference Matters There are over 10,000 so-called cryptocurrencies. And then there is Bitcoin. We are often asked why at Bitcoin21 we focus exclusively...

Proof of Work – More Than Just a Consensus Mechanism Proof of Work is the mechanism that makes Bitcoin secure. Miners invest real energy to verify transactions and find new...

21 Million Bitcoins – The Most Important Number in the World There will never be more than 21 million Bitcoins. No central bank can change this number. No politician. No...

Bitcoin Changes You – If You Stay Long Enough Most people come to Bitcoin because of the price. They stay for something else. Eventually, sometimes after weeks, sometimes after years,...

Bitcoin and Privacy – A Question of Principle When people talk about privacy, they often get a counter-question: "What do you have to hide?" This question sounds logical. But it...

Designed in Hamburg – How Our Bitcoin Clothing Is Made Every piece of Bitcoin21 clothing starts with an idea. And every idea begins with a question: Would we wear this...

Der echte Bitcoin Lifestyle hat mit Lambo-Klischees nichts zu tun: Low Time Preference, Selbstverwahrung und Teile, die halten.

The best Bitcoin gift ideas for Bitcoiners – from socks to caps to shirts. Minimalist basics in good quality, for every occasion and budget.

How Bitcoin is taxed in Germany (as of July 2026): holding period, exemption limit, reporting obligations – and what the government draft passed on 6 July, to abolish the holding period from 2027, means. With sample calculations and FAQ.

On 6 July 2026 the cabinet passed the government draft: the Bitcoin holding period is set to fall from 2027. What that means, why it isn’t a law yet – and how the ProHaltefrist petition is now piling on pressure. As official supporters, we’re on board.

Bitcoin clothing for everyday wear: hoodies, tees, polos, sportswear, accessories. What matters, what makes Bitcoin21 different, and what fits you.