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Bitcoin (BTC / IDR)
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About Bitcoin
Bitcoin is the first decentralized cryptocurrency. Based on a free-market ideology, bitcoin was invented in 2008 when an unknown entity 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.
Bitcoin works through the collaboration of computers, each of which acts as a node in the peer-to-peer bitcoin network. Each node maintains an independent copy of a public distributed ledger of transactions, called a blockchain, without central oversight. Transactions are validated through the use of cryptography, preventing one person from spending another person's bitcoin, as long as the owner of the bitcoin keeps certain sensitive data secret.
Consensus between nodes about the content of the blockchain is achieved using a computationally intensive process based on proof of work, called mining, which is performed by purpose-built computers. WikipediaAbout Indonesian Rupiah
The rupiah is the official currency of Indonesia, issued and controlled by Bank Indonesia. Its name is derived from the Sanskrit word for silver, rupyakam. Sometimes, Indonesians also informally use the word perak in referring to rupiah in coins. The rupiah is divided into 100 cents, although high inflation has rendered all coins and banknotes denominated in cents obsolete.
The rupiah was introduced in 1946 by Indonesian nationalists fighting for independence. It replaced the Japanese-issued version of the Netherlands Indies gulden which had been introduced during the Japanese occupation in World War II. In its early years, the rupiah was used in conjunction with other currencies, including a new version of the gulden introduced by the Dutch. The Riau Islands and the Indonesian half of New Guinea had their own variants of the rupiah, but these were subsumed into the national rupiah in 1964 and 1971, respectively. Wikipedia