Bitcoin is the world’s first decentralized digital currency. It allows anyone to send money to anyone else, anywhere in the world, without a bank, payment processor, or government involved. No one owns or controls it. It runs on a global network of computers that nobody can shut down.
Since it launched in 2009, Bitcoin has gone from a niche experiment worth fractions of a penny to an asset that has traded above $126,000, is held by governments and the world’s largest asset managers, and has fundamentally changed how people think about money.
This guide explains what Bitcoin is, how it works, why it was created, and what role it plays in the financial system today.
Who created Bitcoin and why
Bitcoin was created by a person or group using the pseudonym Satoshi Nakamoto. On October 31, 2008, Nakamoto published a nine-page paper titled “Bitcoin: A Peer-to-Peer Electronic Cash System.” On January 3, 2009, the Bitcoin network went live with the mining of the first block which is still known as the Genesis Block.
Nobody knows who Satoshi Nakamoto is. They have never been identified. In 2010, Nakamoto handed control of the Bitcoin codebase to other developers and disappeared. The estimated 1 million BTC in wallets attributed to Nakamoto has never been moved.
The timing of Bitcoin’s creation was not accidental. It launched in the immediate aftermath of the 2008 global financial crisis, a period when trust in banks, central banks, and financial institutions had collapsed. Nakamoto embedded a headline from The Times newspaper into the Genesis Block: “Chancellor on brink of second bailout for banks.” The message was clear: Bitcoin was designed as an alternative to a financial system that had just failed millions of people.
How Bitcoin works
Bitcoin runs on a technology called a blockchain which is a public ledger that records every transaction ever made. The blockchain is not stored in one place. It is copied across tens of thousands of computers worldwide simultaneously. No single person or institution controls it.
When you send Bitcoin to someone, that transaction is broadcast to the network. A global network of computers called miners, compete to validate that transaction and bundle it together with other recent transactions into a “block.” Once a block is validated, it is permanently added to the chain. This is why it is called a blockchain.
The validation process used by Bitcoin is called Proof of Work. Miners use specialized hardware to solve a complex mathematical puzzle. The first miner to solve it earns the right to add the next block and receives a reward in newly created Bitcoin. This process simultaneously secures the network and controls the rate at which new Bitcoin enters circulation.
Every transaction on the Bitcoin blockchain is public and permanent. Anyone can look up any transaction ever made. But the identities behind wallet addresses are pseudonymous. You can see the transactions, but not necessarily who made them.
The 21 million supply cap — why it matters
One of Bitcoin’s most important features is its hard cap of 21 million coins. No more than 21 million Bitcoin will ever exist. This is written into Bitcoin’s code and cannot be changed without the agreement of the entire network which has never happened on any fundamental rule.
As of 2026, over 20 million Bitcoin have already been mined. The remaining supply is released slowly through mining rewards, which halve approximately every four years in an event called the halving. The most recent halving in April 2024 reduced the block reward from 6.25 BTC to 3.125 BTC per block. The next halving is expected around 2028.
This fixed supply is why Bitcoin is often compared to gold. Gold is scarce because there is a finite amount of it in the earth. Bitcoin is scarce by design, the scarcity is mathematical and guaranteed by code rather than geology. In a world where governments can print unlimited amounts of their own currencies, a provably scarce asset is a fundamentally different kind of money.
Bitcoin as digital gold and store of value
The most dominant use case for Bitcoin in 2026 is as a store of value. A long-term asset people hold to preserve purchasing power over time, similar to how investors have historically used gold.
The argument for Bitcoin as digital gold rests on several properties: it is scarce, it is durable, it is portable, it is divisible, it is verifiable, and it cannot be confiscated or debased by any government. Gold shares the first few properties but fails on portability and verifiability at scale. Bitcoin excels at all of them.
This is no longer just a retail investor thesis. Over 190 public companies now hold Bitcoin on their balance sheets, collectively owning more than 1.1 million BTC. The U.S. government signed an executive order in 2025 establishing a strategic digital asset reserve. BlackRock, the world’s largest asset manager with over $11 trillion under management, runs a spot Bitcoin ETF and has publicly described Bitcoin as a legitimate portfolio asset.
Bitcoin ETFs — how institutions access Bitcoin
In January 2024, the U.S. Securities and Exchange Commission approved spot Bitcoin ETFs for the first time. This was a turning point moment. It meant that any investor with a standard brokerage account could gain exposure to Bitcoin without needing to buy, store, or secure it themselves.
BlackRock’s iShares Bitcoin Trust (IBIT) quickly became one of the fastest-growing ETFs in history, accumulating tens of billions in assets. By 2026, the total Bitcoin ETF complex manages over $58 billion in assets, and ETF flow data which is how much money is flowing in or out each day, has become one of the most closely watched signals for where Bitcoin’s price is heading.
For a detailed breakdown of Bitcoin ETF flows, what the data shows about institutional positioning, and what it means for price:
⟶ Crypto Liquidity, ETF Flows & Positioning: Is Capital Returning or Just Rotating?Bitcoin halvings and price cycles
Bitcoin’s price history is closely tied to its four-year halving cycle. Each time the block reward halves, the rate of new Bitcoin supply entering the market is cut in half. If demand stays the same or increases while supply growth slows, price tends to rise.
The historical pattern has been consistent: a halving is followed by a period of rising prices as the supply squeeze takes effect, followed eventually by a sharp correction, followed by a new cycle. The all-time highs of 2013, 2017, 2020, and 2025 each followed a halving by roughly 12–18 months.
Bitcoin hit its most recent all-time high of over $126,000 in late 2025, approximately 18 months after the April 2024 halving. It has since corrected to around $69,000 as of early April 2026, consistent with mid-cycle correction behaviour seen in previous cycles.
This does not mean the pattern will repeat indefinitely. But understanding the halving cycle is essential context for anyone trying to understand why Bitcoin’s price moves the way it does.
How to buy Bitcoin
Buying Bitcoin involves three steps: choosing an exchange, verifying your identity, and making a purchase.
Most people buy Bitcoin through a cryptocurrency exchange which is a platform that connects buyers and sellers. Exchanges vary in fees, security, available payment methods, and regulatory status. For beginners, the most important factors are ease of use, regulatory compliance, and security track record. You can find our full breakdown of the best crypto exchanges for beginners to compare the top options.
Once you have purchased Bitcoin, you need somewhere to store it. You can leave it on the exchange, which is convenient but carries custody risk. Essentially, the exchange holds your Bitcoin on your behalf. Alternatively, you can move it to a self-custody wallet, where you control your own private keys. This is more secure but requires you to take responsibility for your own security. Our complete guide to crypto wallet setup walks through the process step by step.
Security is not optional. Bitcoin transactions are irreversible. If you lose your private keys or fall victim to a phishing attack, there is no customer support to call. Our crypto security practices guide covers everything you need to know to protect your holdings.
Bitcoin vs gold — key differences
Bitcoin and gold are both used as stores of value, but they work very differently.
Gold has a 5,000-year track record. It is a physical commodity with industrial uses, universally recognised, and extremely liquid in institutional markets. Bitcoin is 17 years old, entirely digital, and its long-term track record is still being established.
Bitcoin is more portable than gold. Anyone can move any amount anywhere in the world in minutes with a phone. Gold cannot do that. Bitcoin is more divisible. One Bitcoin can be divided into 100 million units called satoshis. Bitcoin is more verifiable. Anyone can check the supply and transaction history instantly. Gold requires physical assay.
Bitcoin is also more volatile. Gold moves a few percent in a year. Bitcoin regularly moves 50-80% in a cycle. For investors, this means Bitcoin offers higher potential returns and higher potential losses than gold.
Bitcoin’s role in the financial system today
Bitcoin in 2026 sits at the intersection of two narratives that have converged: speculative asset and institutional infrastructure.
On the speculative side, Bitcoin remains a high-volatility asset that attracts retail and institutional traders looking for outsized returns relative to traditional markets.
On the infrastructure side, Bitcoin underpins a growing ecosystem of financial products, ETFs, corporate treasury holdings, sovereign reserves, and increasingly, a network of on-chain financial services that interact with the broader institutional adoption and tokenization wave reshaping global finance.
The question of whether Bitcoin is primarily a speculative asset or a genuine monetary alternative has not been definitively answered. What has been answered is that it is not going away. The infrastructure built around it of custody, regulation, ETFs, corporate holdings, is too large and too deeply embedded in the financial system for that to happen.
Frequently asked questions
Is Bitcoin legal? Yes, in most countries. Bitcoin is legal to buy, hold, and use in the United States, European Union, UK, and most of the developed world. A small number of countries have restricted or banned it. Regulatory frameworks are becoming clearer globally, with the U.S. GENIUS Act and EU’s MiCA regulation providing increasingly defined legal structures.
Can Bitcoin be hacked? The Bitcoin network itself has never been successfully hacked in 17 years of operation. Exchanges and individual wallets have been hacked, but that is a custody problem, not a protocol problem. Keeping Bitcoin in self-custody with proper security practices eliminates exchange custody risk.
What is a Bitcoin wallet? A Bitcoin wallet is software or hardware that stores your private keys. The cryptographic proof of ownership that lets you spend your Bitcoin. Wallets do not actually store Bitcoin; the Bitcoin lives on the blockchain. The wallet stores the keys that prove you own it.
What is a Bitcoin halving? A halving is a programmed event that cuts the Bitcoin mining reward in half approximately every four years. It is designed to control inflation and ensure that the total supply never exceeds 21 million. The most recent halving was in April 2024.
How many Bitcoin are there? Over 19.8 million Bitcoin have been mined out of a maximum of 21 million. An estimated 3-4 million Bitcoin are considered permanently lost due to forgotten passwords, lost hard drives, and early wallets that no longer exist.
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