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May 3, 2026
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Capitalizations Index – B ∞/21M

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Understanding Bitcoin Futures: A Guide to Speculative Contracts Bitcoin Mined Count: 19.7 Million as of 2025 Explained The Fixed Supply of Bitcoin: Limited to 21 Million Coins Understanding Bitcoin Addresses Starting with ‘1’: The P2PKH Format How Bitcoin Works: Peer-to-Peer Validation via Cryptography

Lecture 1 — Intro to Crypto and Cryptocurrencies

Lecture 1 — intro to crypto and cryptocurrencies

Lecture 1 — Intro to Crypto and Cryptocurrencies

Lecture 1 — intro to crypto and cryptocurrenciesFirst lecture of the bitcoin [BTC] and bitcoin [BTC] technologies online course.

For the accompanying textbook, including the free draft version, see: http://bitcoinbook.cs.princeton.edu/

In this lecture (click the time to jump to the section):
* Cryptographic hash functions 1:51
* Hash pointers and data structures 20:28
* Digital signatures 29:25
* Public keys as identities 39:04
* A simple bitcoin [BTC] 44:39

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