Josef Tětek

Josef Tětek is an economist and expert in Bitcoin and its security. He has been dedicated to this field for many years. Since 2021, he has been collaborating with Trezor, the manufacturer of the first hardware Bitcoin wallet of the same name. In the same year, he began providing consultancy services in the area of Bitcoin security. He is the author of the books “Bitcoin: The Separation of Money and State” (2021) and “Bitcoin: The Return of Sound Money” (2023). Josef is also the creator of the podcast “Stackuj” (in Czech), which focuses on Bitcoin and money. He regularly gives lectures on topics such as Bitcoin and self-custody, working with passphrases, multisignature setups, or advanced seed management.

Expertise

Josef provides consultancy in the field of Bitcoin security. He assists a wide range of clients – from beginners, with whom he sets up their first hardware wallet, to advanced users, with whom he consults on sophisticated methods of private key backup. He also discusses Bitcoin purchasing options with his clients and helps them choose the most suitable platform – tailored to each individual’s needs. In his practice, he further focuses on privacy and security issues, such as proper UTXO management or the separation of coins based on their origin.