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Um Bitcoin
Bitcoin is the first decentralized cryptocurrency. Based on a free-market ideology, bitcoin was invented in 2008 by Satoshi Nakamoto, an unknown person. Use of bitcoin as a currency began in 2009, with the release of its open-source implementation. In 2021, El Salvador adopted it as legal tender. It is mostly seen as an investment and has been described by some scholars as an economic bubble. As bitcoin is pseudonymous, its use by criminals has attracted the attention of regulators, leading to its ban by several countries as of 2021.
Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that secures the bitcoin blockchain. Mining consumes large quantities of electricity and has been criticized for its environmental impact. WikipediaUm Suðurafrískt rand
The South African rand, or simply the rand, is the official currency of South Africa. It is subdivided into 100 cents, and a comma separates the rand and cents.
The South African rand is legal tender in the Common Monetary Area member states of Namibia, Lesotho, and Eswatini, with these three countries also having national currencies: pegged with the rand at parity and still widely accepted as substitutes. The rand was also legal tender in Botswana until 1976 when the pula replaced the rand at par. Wikipedia