What Bitcoin is
Bitcoin is a form of digital money that runs on a global network of computers rather than being issued by any government or bank. It launched in 2009, and it was the first asset to solve a hard problem: how to send value over the internet without a middleman like a bank verifying every transaction.
Instead of a bank's ledger, Bitcoin uses a shared public record called a blockchain. Thousands of computers around the world keep a copy and agree on it, which is what makes the system hard to censor or shut down. No single company controls it.
The fixed supply: 21 million
The single most important fact about Bitcoin is that its supply is capped. There will only ever be 21 million bitcoins, and the rate at which new ones are created is cut in half roughly every four years in an event called the halving.
This is a deliberate contrast with traditional money, where central banks can create more currency. Supporters argue that a fixed supply makes Bitcoin a hedge against the gradual loss of purchasing power that comes with inflation. Whether that thesis holds is debated, but the scarcity is real and built into the code.
💡 Scarcity is the core idea:When people call Bitcoin digital gold, the comparison is about scarcity. Like gold, no one can simply produce more of it on demand. Unlike gold, the exact remaining supply and issuance schedule are known in advance.
Why the price swings so much
Bitcoin is famous for dramatic price moves. It has risen and fallen by more than 50% multiple times in its history. There are a few reasons: it is still a relatively young and small market, it trades 24 hours a day worldwide, and its value rests entirely on supply and demand rather than on cash flows like a company's earnings.
Because there is no underlying business producing profits, there is no agreed way to value Bitcoin the way you might value a stock. That uncertainty, combined with strong emotions on both sides, produces big swings. Understanding this is essential before following the price. Our guide on volatility explains the idea in more depth.
How people hold Bitcoin
There are two broad ways to own Bitcoin. You can buy the actual coin through a crypto exchange and hold it in a wallet, where you are responsible for keeping the keys safe. Or you can get exposure through regulated products, such as a spot Bitcoin ETF in a normal brokerage account, without managing wallets yourself.
Each approach has tradeoffs around control, security, and convenience. The important point for a beginner is that there are now mainstream, regulated ways to get exposure, which did not exist in Bitcoin's early years.
Its role in a portfolio
Most cautious investors who hold Bitcoin treat it as a small, high-risk slice of a diversified portfolio rather than a core holding. The logic is simple: the upside has at times been large, but so have the drawdowns, so a position small enough to lose without derailing your finances keeps the risk contained.
None of this is a recommendation to buy. It is a description of how Bitcoin is commonly used. You can follow the live price on our Bitcoin page and add it to your watchlist to observe how it behaves before deciding whether it belongs in your plan at all.