What is a hierarchical deterministic (HD) wallet? How are paper wallets different from hardware wallets? Which of the Bitcoin wallets and / or clients (mobile, desktop, hardware) is best for storing coins? Are hardware wallets with Bluetooth secure? Regarding desktop wallets, what happens if your hard drive fails? Should you use different tools for storage of keys versus spending? Should you encrypt a text file for cold storage of keys? These questions are from the fourth session of MOOC 11, which took place on February 22nd 2019. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Are hardware wallets secure enough? - https://youtu.be/3zNVDIz6Snw How do I choose a wallet? - https://youtu.be/tN6b62sEpsY Secure, tiered storage system - https://youtu.be/uYIVuZgN95M Hardware wallets and attack surface - https://youtu.be/8mpDcBfNA7g Setting up secure storage devices - https://youtu.be/wZ9LxLLvfXc What is a private key? - https://youtu.be/xxfUpIV9wRI How do mneomonic seeds work? - https://youtu.be/wWCIQFNf_8g Using paper wallets - https://youtu.be/cKehFazo8Pw Wallet design and mass adoption - https://youtu.be/WbZX6BDZJHc Cryptographic primitives - https://youtu.be/RIckQ6RBt5E Public keys vs. addresses - https://youtu.be/8es3qQWkEiU Re-using addresses - https://youtu.be/4A3urPFkx8g Passphrases and seed storage - https://youtu.be/jP7pEgBpaO0 Coin selection and privacy - https://youtu.be/3Ck683CQGAQ Multi-signature and distributed storage - https://youtu.be/cAP2u6w_1-k Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0 Is quantum computing a threat? - https://youtu.be/wlzJyp3Qm7s How to get people to care about security - https://youtu.be/Ji1lS9NMz1E Wallets, nodes, and monetary sovereignty - https://youtu.be/8Hb3tUn8s4E Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in Bitcoin. He is the author of “Mastering Bitcoin,” “The Internet of Money" series, and "Mastering Ethereum." Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ Subscribe to the channel to learn more about Bitcoin & open blockchains; click on the red bell to enable notifications about new videos! MASTERING BITCOIN, 2nd Edition: https://amzn.to/2xcdsY9 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ THE INTERNET OF MONEY, v1: https://amzn.to/2ykmXFs THE INTERNET OF MONEY, v2: https://amzn.to/2IIG5BJ Translations of THE INTERNET OF MONEY: Spanish, 'Internet del Dinero' (v1) - https://amzn.to/2yoaTTq German, 'Das Internet des Geldes' (v1) - https://amzn.to/2LEiyqO German, 'Das Internet des Geldes' (v2) - https://amzn.to/2VCzse5 French, 'L'internet de l'argent' (v1) - https://www.amazon.fr/Linternet-largent-Andreas-M-Antonopoulos/dp/2856083390 Russian, 'Интернет денег' (v1) - https://www.olbuss.ru/catalog/ekonomika-i-biznes/korporativnye-finansy-bankovskoe-delo/internet-deneg Vietnamese, 'Internet Của Tiền Tệ' (v1) - https://alphabooks.vn/khi-tien-len-mang MASTERING ETHEREUM: https://amzn.to/2xdxmlK Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)