What is Bitcoin?
Crypto Glossary Definition
The first successful and widely used implementation of a blockchain, originally proposed by Satoshi Nakamoto. It's a peer-to-peer payment system and store of value. Bitcoin can refer to both the tradable asset as well as the underlying protocol and technology.
Why Bitcoin Matters
Bitcoin matters to newcomers mainly as the reference point every other coin gets compared against — "market cap in BTC terms," "priced in sats," and "Bitcoin dominance" are all ways traders gauge whether money is flowing into or out of the wider crypto market. Its fixed 21 million supply cap is the core argument behind calling it "digital gold."
Bitcoin in Practice
A financial journalist writing about a sudden shift in crypto market sentiment opens with the observation that Bitcoin dominance just crossed 55 percent, a figure describing what share of the total crypto market's value is held in Bitcoin specifically, rising sharply as capital rotates out of altcoins and into what many investors treat as the relatively safer bet within crypto. Readers unfamiliar with the space might wonder why Bitcoin gets treated as a category of its own rather than just one cryptocurrency among thousands, and the article explains that Bitcoin, first described by the pseudonymous Satoshi Nakamoto as a peer-to-peer electronic cash system, was the original successful implementation of blockchain technology and remains the reference point every other project gets measured against, whether through market cap comparisons, prices quoted in satoshis, or dominance metrics like the one driving this particular headline. The piece goes on to note that Bitcoin's fixed supply cap of 21 million coins, a hard limit written into its protocol from the start, underpins much of the digital gold narrative investors use to justify holding it as a long-term store of value rather than simply a speculative trading asset. By the article's end, even a reader new to crypto understands why so much market commentary treats Bitcoin's price action as a barometer for the entire industry.
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