Are hardware wallets really secure enough? Is the complexity of the setup and execution part of the risk model? What are the most likely ways that you will lose your bitcoin? What is the best way to store your mnemonic seed and passphrase?

If you want to see more about key management practices, check out this playlist:

More on Trace Mayer’s monetary sovereignty initiative:

CORRECTION: At 9:13, I referred to paper as “Stone Age technology.” While I was trying to convey the simplicity of the tool with such a phrase, this is not historically accurate as paper-making is not generally thought to have begun until thousands of years after the Stone Age.

This question is from the January monthly subscriber session, which took place on January 26th 2019. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron:

How do I choose a wallet? –
Secure, tiered storage system –
Hardware wallets and attack surface –
Setting up secure storage devices –
What is a private key? –
How do mneomonic seeds work? –
Using paper wallets –
Wallet design and mass adoption –
Cryptographic primitives –
Public keys vs. addresses –
Re-using addresses –
Passphrases and seed storage –
Coin selection and privacy –
Multi-signature and distributed storage –
Nonces, mining, and quantum computing –
Is quantum computing a threat? –
Spam transactions and Child Pays For Parent –
Orphan blocks and stuck transactions –
Miners, pools, and consensus –
Software distribution security –
Protocol development security –
Geopolitics and state-sponsored attacks –
Sanctions and censorship resistance –
How to get people to care about security –
Honest nodes and consensus –
Why running a node is important –
Wallets, nodes, and monetary sovereignty –

Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin.

Follow on Twitter: @aantonop

He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters.

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Would you like to help me translate these videos into other languages? Follow this link for instructions on subtitling:


Translations of MASTERING BITCOIN:



Translations of THE INTERNET OF MONEY:
Spanish, ‘Internet del Dinero’ (v1) –
French, ‘L’internet de l’argent’ (v1) –
Russian, ‘Интернет денег’ (v1) –
Vietnamese, ‘Internet Của Tiền Tệ’ (v1) –


Music: “Unbounded” by Orfan (
Outro Graphics: Phneep (
Outro Art: Rock Barcellos (