Bitcoin

Bitcoin (abbreviation: BTC; sign: ₿) is the first decentralized cryptocurrency. Based on a free-market ideology, bitcoin was invented in 2008 when an unknown person published a white paper under the pseudonym of Satoshi Nakamoto. Use of bitcoin as a currency began in 2009, with the release of its open-source implementation. From 2021 to 2025, El Salvador adopted it as legal tender currency before revoking it. As bitcoin is pseudonymous, its use by criminals has attracted the attention of regulators, leading to its ban by several countries.

A blockchain is a distributed ledger with growing lists of records (blocks) that are securely linked together via cryptographic hashes. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree, where data nodes are represented by leaves). Since each block contains information about the previous block, they effectively form a chain (viz. linked list data structure), with each additional block linking to the ones before it. Consequently, blockchain transactions are resistant to alteration because, once recorded, the

an online platform where you can buy, sell, or trade digital currencies, like Bitcoin, Ethereum, or other tokens, either against other cryptocurrencies or traditional (fiat) money

July 2020 compromise of multiple verified Twitter accounts to post scam Tweets

"Layer 2" payment protocol that operates on top of a blockchain-based cryptocurrency

peer-to-peer payment network that operates on a cryptographic protocol

bitcoin exchange based in Tokyo, Japan

Kiosks facilitating the purchase of Bitcoin

2015 film by Alex Winter

Strategy Inc., formerly known as MicroStrategy, is an American company that provides business intelligence (BI) and mobile software. Founded in 1989 by Michael J. Saylor, Sanju Bansal, and Thomas Spahr, the firm develops software to analyze internal and external data in order to make business decisions and to develop mobile apps. It is a public company headquartered in Tysons Corner, Virginia, in the Washington metropolitan area. Its primary business analytics competitors include SAP SE Business Objects, IBM Cognos, and Oracle Corporation's BI Platform. Saylor is the executive chairman and, fr

Double-spending is the unauthorized spending of the same money (either digital or conventional) more than once. As with counterfeit money, double-spending leads to supply inflation by creating a new amount of copied currency that did not previously exist. It can also devalue the currency and diminish user trust in the currency.

thumb|Bitstamp logo (2013–2017)|150px Bitstamp is a Luxembourg-based cryptocurrency exchange founded in 2011. Considered the world’s longest-running cryptocurrency exchange, its business operations are conducted from its registered headquarters in Luxembourg City, with a satellite office in Ljubljana.

history of the cryptocurrency

energy and other resources used by bitcoin

thumb|SegWit logo Segregated Witness (SegWit), formally known as Segregated Witness (Consensus layer), is an implemented soft fork change in the transaction format of bitcoin.

8,000 Bitcoin buried in Docksway landfill, Newport, Wales

Wikimedia list article

scaling problem in bitcoin processing

use and legal status of bitcoin in El Salvador

El Salvador legislation

strategic cryptocurrency reserve of the United States

planned smart city project in El Salvador

Bitnation, or crypto nation, was a cryptocurrency-based project self-described as a "voluntary nation", wherein all citizens chose to be citizens, founded in 2014 by Susanne Tarkowski Tempelhof. A part of the process for becoming a citizen involved recording vital records, identity, and other legal events through the use of a smart contract on the Ethereum blockchain.

human settlement in El Salvador

American entrepreneur

Cryptoeconomics is an evolving economic paradigm for a cross-disciplinary approach to the study of digital economies and decentralized finance (DeFi) applications. Cryptoeconomics integrates concepts and principles from traditional economics, cryptography, computer science, and game theory disciplines. Just as traditional economics provides a theoretical foundation for traditional financial (a.k.a., Centralized Finance or CeFi) services, cryptoeconomics provides a theoretical foundation for DeFi services bought and sold via fiat cryptocurrencies, and executed by smart contracts.

cryptocurrency that is a hard fork of Bitcoin Cash (2018)

2014 film