What is Bitcoin and why was it invented?

Bitcoin is often described as the first cryptocurrency, and for good reason. Created in 2009, it introduced the idea of digital, decentralised money to the world. Since then, it has evolved from a niche innovation into a globally recognised digital asset, used for everything from peer-to-peer payments to long-term value storage.

Understanding what Bitcoin is and why it was created is essential for anyone looking to explore the digital asset space. Whether you're just beginning your crypto journey or looking to diversify your portfolio, Bitcoin remains the cornerstone of this ecosystem.

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What is Bitcoin?

Bitcoin is a decentralised digital currency that allows people to send and receive money directly, without going through a central authority such as a bank or government. These transactions are verified by participants in the network and recorded on a public ledger known as the blockchain.

It was introduced in 2009 by someone (or a group) under the name Satoshi Nakamoto. Bitcoin was designed to be a digital alternative to traditional money, giving users more control over their finances.

At its core, Bitcoin runs on blockchain technology. This system acts like a public record book, where every transaction is securely documented. Once a transaction is verified, it’s grouped into a block and added to the chain, creating a history that’s visible, secure, and nearly impossible to tamper with.

Why was Bitcoin created?

To understand Bitcoin’s purpose, it helps to look at the timing of its launch. The 2008 global financial crisis exposed major weaknesses in the banking system, such as the lack of transparency, risky lending practices, and an overdependence on central authorities. Many people lost trust in traditional finance. Bitcoin emerged as a response.

It offered a new model that didn’t rely on banks or governments. Instead, it allowed people to transact directly with each other, using a system built on transparency and mathematical rules, not trust.

A key goal was to offer an alternative to inflation-prone fiat currencies. Central banks can issue new money at will, which may lead to currency devaluation. Bitcoin, by contrast, has a fixed supply, which helps to protect its value over time.

Just as importantly, Bitcoin promotes financial sovereignty. Anyone with internet access can use it, regardless of location or banking access. It’s particularly useful in areas with limited financial infrastructure or where trust in institutions is low.

How does Bitcoin work?

To understand how Bitcoin functions behind the scenes, it helps to look at how the network stays secure. That’s where Proof of Work (PoW) comes in.

Here’s a simple breakdown:

• When someone sends Bitcoin, the transaction is broadcast to the entire network.
• Specialised participants, called miners, compete to verify the transaction by solving complex puzzles. This process requires substantial computing power and energy.
• The first miner to solve the puzzle verifies the block of transactions. This block is then added to the blockchain.

This process is a bit like a race to complete a Sudoku puzzle. Whoever finishes first gets rewarded, but everyone else can check that the solution is valid. It ensures fairness, prevents fraud, and keeps the system running without needing a central authority.

Miners are rewarded with new Bitcoin and transaction fees, which helps maintain the network’s incentive structure.

Another defining feature of Bitcoin is its fixed supply. There will only ever be 21 million Bitcoins produced (i.e., mined) with the last one scheduled to be mined in 2140. This built-in scarcity is one of the reasons some people compare it to gold, and it plays a key role in its long-term value proposition.

What makes Bitcoin valuable?

Several factors contribute to Bitcoin’s ongoing value:

Decentralisation: There’s no single company or person in charge of Bitcoin. Its network is maintained by thousands of independent nodes (i.e., computers) around the world, making it resistant to censorship and shutdown.

Security and immutability: Once confirmed, Bitcoin transactions are recorded on the blockchain and cannot be altered. This provides a high level of trust and reduces the risk of fraud.

Limited supply: Bitcoin’s capped supply of 21 million coins is hardcoded into its software. Unlike traditional currencies that can be printed in unlimited amounts, Bitcoin's scarcity may help it hold value over time.

Universal access: Anyone with an internet connection can send, receive, or store Bitcoin. There are no bank queues, business hours, or paperwork barriers. This makes Bitcoin especially appealing in underserved or high-inflation regions.

Taken together, these qualities help explain why Bitcoin continues to attract both everyday users and institutional interest.

How Bitcoin has evolved over time

In the beginning, Bitcoin was mostly used by developers, hobbyists, and early adopters. It was viewed as experimental and often misunderstood. That perception began to shift around 2013, as more people began to take an interest, and its value started to rise. Over time, Bitcoin weathered price volatility, regulatory debates, and security concerns and emerged stronger from each cycle.

Today, Bitcoin has reached mainstream awareness. Major companies have explored accepting it, investment funds have added it to their portfolios, and regulators in several countries have developed clearer guidelines.

Some now refer to it as digital gold, highlighting its role as a potential store of value in the digital age.

How to buy and trade Bitcoin with BTC Markets

Getting started with Bitcoin on BTC Markets is simple. Here’s a step-by-step guide:

• Create an account – Head to BTC Markets and sign up.
• Then go through the KYC (Know Your Customer) process to verify your identity, as required by Australian regulators.
• Deposit funds – add AUD to your account through supported payment options, such as PayID and bank transfer.
• Buy Bitcoin - visit the Bitcoin Trading Page. Enter the amount you’d like to purchase and confirm the trade.
• Secure your Bitcoin – Your funds are held securely on BTC Markets, but you may also consider transferring them to a private wallet for added control.
• Track and learn – Stay informed with regular insights, market updates, and educational guides on the BTC Markets Learn Hub.

BTC Markets offers a reliable environment for buying and trading Bitcoin, with Australian support, local compliance, and a focus on security.

Curious about the next step in your crypto journey? Visit the BTC Markets blog for step-by-step guides, market updates, and real-world insights.