# Bitcoin Everyone has heard of it, everyone knows it - Bitcoin. The first cryptocurrency to exist, and by far the largest, with a market cap of roughly 1.5 trillion USD, ranking it within the 10 largest assets in the world, alongside the likes of silver and Meta (Facebook). Its relative stability in price (compared to *other* cryptocurrencies) makes it part of most crypto portfolios globally. A few facts about bitcoin: * Bitcoin is the first crypto to exist, created in 2008 * It is *decentralised (like all cryptocurrencies),* meaning it is not controlled by any single person or group * It has a **fixed** supply of 21 million bitcoin * It is estimated that 99% of bitcoin holders are currently in profit (As of March 2024) For more on bitcoin, visit [here](https://www.investopedia.com/terms/b/bitcoin.asp). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://solanaupdate.gitbook.io/the-crypto-bible/investing/building-a-portfolio/bitcoin.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.