Bitcoin
Bitcoin is a decentralized digital currency and peer-to-peer payment system that operates without a central authority or intermediaries. It uses blockchain technology to record transactions in a public ledger, secured by cryptographic proof-of-work consensus. As the first cryptocurrency, it enables users to send and receive value globally with pseudonymity and resistance to censorship.
Developers should learn Bitcoin to build applications in decentralized finance (DeFi), payment systems, or blockchain-based services, as it provides a foundational understanding of cryptocurrency mechanics. It's essential for roles in fintech, cybersecurity, or when working on projects requiring immutable ledgers, smart contracts (via layers like Lightning Network), or exploring alternative monetary systems. Knowledge is also valuable for compliance, auditing, or integrating crypto payments into platforms.