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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...

On January 11, 2009 Hal Finney wrote two words: “Running bitcoin”. Seven months later came the ALS diagnosis, and seventeen days after that he ran a half marathon in 1:59:27. The whole story.

The real Bitcoin lifestyle has nothing to do with Lambo clichés: Low Time Preference, self-custody and pieces that last.

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 September 2026): holding period, exemption limit, reporting obligations – and the new draft bill with a cut-off date of 31 December 2026, grandfathering for legacy holdings and loss offsetting against stocks. With sample calculations and FAQ.

The draft bill is on the table: crypto gains are to be taxed like securities, with a cut-off date of 31 December 2026 and grandfathering for legacy holdings. What that means for you, why nothing has been decided yet – and how the ProHaltefrist petition keeps up the pressure until 15 September.

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