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Learn what Bitcoin is, how it works and its key tokenomics in plain terms – from its 2009 launch to the 3.125 BTC block reward today.
Bitcoin is a peer‑to‑peer digital currency launched in 2009 that lets users send value without a bank, and its built‑in scarcity—now 3.125 BTC per block—makes it comparable to “digital gold” for many investors [1]. Understanding these basics helps anyone, even a grandmother, see why the asset matters and how its design limits supply.
| At a glance | |
|---|---|
| Launch year | 2009 |
| Current block reward | 3.125 BTC |
| Total supply limit | 21 million BTC |
| Halving cycle | Every 4 years (next to 1.5625 BTC ≈ mid‑2028) |
Bitcoin (BTC) is a cryptocurrency that operates on a decentralized blockchain—a distributed ledger stored on many computers rather than a single server [1]. Each block contains a header, a list of transactions and a cryptographic hash that links it to the previous block, creating an immutable chain. The network validates transactions through “mining,” where participants solve a SHA‑256 puzzle; the first to solve it adds the block and receives newly minted bitcoins as a reward. This process solves the “double‑spend” problem that plagues digital cash systems [2].
The protocol halves the block reward roughly every four years, a mechanism known as “halving.” Miners earned 50 BTC per block in 2009; by April 2024 the reward fell to 3.125 BTC, and it will halve again to 1.5625 BTC around mid‑2028 [1]. This predictable reduction limits the creation of new bitcoins and caps the total supply at 21 million, a figure often likened to gold’s finite nature. Because the supply schedule is hard‑coded, market participants can anticipate future scarcity, which underpins the view of Bitcoin as a potential hedge against inflation.
Most people obtain Bitcoin by buying fractions on exchanges such as Coinbase, using fiat currency like U.S. dollars [1]. A single bitcoin is divisible to eight decimal places, with the smallest unit called a satoshi (0.00000001 BTC) [1]. Once owned, Bitcoin can be stored in a digital wallet and sent instantly worldwide, similar to emailing a digital dollar, bypassing traditional banking channels [2].
Bitcoin’s design—decentralized verification, capped supply and regular halving—creates a unique asset class that blends technology with monetary scarcity. As the network continues to mature, the interplay between its fixed supply and evolving demand will determine whether it fulfills the “digital gold” narrative or takes on a different role in the global financial system.
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AI-assisted synthesis by the TrendWatcher Editorial Desk · sourced from 3 outlets · Jul 10, 2026 · How we report
Bitcoin was described in a 2008 whitepaper by the pseudonymous Satoshi Nakamoto and launched in January 2009 with the mining of the genesis block.
Metaplanet is conducting a joint study with JPYC, Progmat, and Siiibo Securities to develop tokenized credit products that use Bitcoin as collateral for daily‑interest instruments.
Bitcoin’s supply is limited to 21 million coins, with new coins minted through mining rewards that halve roughly every 210,000 blocks, about every four years.