Why is 21 million bitcoin the maximum supply? Can it be modified? Why will we never actually reach 21 million bitcoin? Estimates of bitcoin lost so far. Miners can give themselves less than the subsidy. Satoshis becoming the new default unit. These questions are from the second and third session of MOOC 12, which took place on September 19th and 27th 2019, respectively. 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: Measuring Success: Price or Principle - https://youtu.be/mPMsbgWl9p4 Beyond Price: Bitcoin's Impact on the Future - https://youtu.be/rvwVbRQ5Ysc Consensus Algorithms, Blockchain Technology, and Bitcoin - https://youtu.be/fw3WkySh_Ho Advanced Bitcoin Scripting Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 Software distribution security - https://youtu.be/_V0vqy046YM What is mining? - https://youtu.be/t4p4iMqmxbQ The mining process - https://youtu.be/L4Xtau0YMJw Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0 Iterating nonces and the block reward - https://youtu.be/tjn2aoMaFlY Miners, pools, and consensus - https://youtu.be/JHz7LM4ncLw Mining, energy prices, and fee market - https://youtu.be/hrVCd6Pt4l4 What is difficulty targeting? - https://youtu.be/h429LCTRmQw Genesis block and coinbase transactions - https://youtu.be/strhfzJ56QE Cryptographic primitives - https://youtu.be/RIckQ6RBt5E The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E Rules versus rulers - https://youtu.be/9EEluhC9SxE The value of proof-of-work - https://youtu.be/ZDGliHwstM8 Could a state-sponsored 51% attack work? - https://youtu.be/KUd8ZGgm6Qo Honest nodes and consensus - https://youtu.be/KAhY2ymI-tg Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Is Bitcoin a democracy? - https://youtu.be/TC3Hq76UT5g Governments versus Proof-of-Work or Proof-of-Stake - https://youtu.be/qrwgYDAoZV0 Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU What is the role of nodes? - https://youtu.be/fNk7nYxTOyQ Why running a node is important - https://youtu.be/oX0Yrv-6jVs Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Energy consumption - https://youtu.be/2T0OUIW89II Solar energy and mining in space - https://youtu.be/cusakcpa8AM Bitmain and ASICBoost allegations - https://youtu.be/t6jJDD2Aj8k Binance hack, chain rollback? - https://youtu.be/2cZhkV6BqLg Block reward, reorg protection, and immutability - https://youtu.be/R6KMp6vkeVU Price and hashpower metrics - https://youtu.be/5JBulDoy8Xk Medium of exchange, unit of account, and reserve currency - https://youtu.be/ExuHOCyje-w 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://twitter.com/grassfedbitcoin) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)