Bitcoin was the first cryptocurrency, launched in 2009 by a pseudonymous creator known as Satoshi Nakamoto. It introduced the idea that money could exist as a purely digital asset, secured by mathematics and maintained by a global network, without any government or institution backing it. Sixteen years later, Bitcoin remains the largest cryptocurrency by market cap and the one most widely held by both retail and institutional investors.

How Bitcoin works

Bitcoin runs on its own blockchain, a public ledger that records every transaction ever made on the network. When you send Bitcoin to someone, the transaction is broadcast to the network, verified by miners, and permanently recorded.

Mining is the process that secures the Bitcoin network. Miners use specialized hardware to solve computational puzzles. The first miner to solve each puzzle earns the right to add the next block of transactions to the blockchain and receives a reward in newly created Bitcoin. This reward is currently 3.125 BTC per block (as of the most recent halving in April 2024) and decreases by half approximately every four years.

The mining process accomplishes two things simultaneously: it processes transactions and it controls the rate at which new Bitcoin enters circulation.

Fixed supply

Bitcoin's most defining feature is its hard cap of 21 million coins. This limit is written into the protocol and cannot be changed without consensus from the network, which has never happened and is widely considered unlikely.

Approximately 19.7 million Bitcoin have already been mined. The remaining 1.3 million will be released gradually through mining rewards, with the final Bitcoin expected to be mined around the year 2140. This predictable, declining supply schedule is central to how many investors think about Bitcoin's long-term value.

Halving cycles

Every 210,000 blocks (roughly every four years), the Bitcoin mining reward cuts in half. This event is called the halving. In 2009, miners earned 50 BTC per block. After the most recent halving in 2024, they earn 3.125 BTC.

Halvings matter to traders because they reduce the rate of new supply entering the market. If demand stays constant or grows while supply issuance drops, basic economics suggests upward price pressure. Historically, Bitcoin's price has seen significant appreciation in the 12 to 18 months following each halving, though past performance never guarantees future results.

Why Bitcoin matters as an asset class

Bitcoin has evolved from a niche technology experiment into a globally traded asset. It trades on every major exchange and trading platform, attracts institutional investment from hedge funds and public companies, and has been approved for exchange-traded funds (ETFs) in the United States.

For traders, Bitcoin offers several properties that set it apart from traditional assets. It trades 24/7 across global markets. Its supply is mathematically fixed, removing central bank policy as a variable. Its price movements are driven by a unique mix of adoption trends, regulatory developments, macro liquidity, and network activity.

Bitcoin also serves as the benchmark for the entire cryptocurrency market. When Bitcoin moves, the rest of the market tends to follow. Understanding Bitcoin's price dynamics is foundational to trading any other cryptocurrency.

Risks to understand

Bitcoin's volatility is significantly higher than traditional assets. Drawdowns of 30% to 50% have occurred multiple times during otherwise bullish periods. Regulatory developments in major markets like the U.S., EU, or China can move the price sharply in either direction. And while the network itself has never been hacked, individual holders can lose funds through poor security practices, phishing, or exchange failures.

These risks are real, and any trader entering Bitcoin should size positions accordingly. Bitcoin's upside potential comes paired with downside risk that exceeds what most traditional asset classes deliver.