Bitcoin (BTC)

Bitcoin (BTC) remains the most widely recognised cryptocurrency in the world. Launched in the aftermath of the 2008 financial crisis, it introduced the concept of digital scarcity and trustless money. For Australian investors, Bitcoin is often the first — and sometimes only — crypto exposure they seek.

Whether viewed as digital gold, a hedge against inflation, or simply a high-volatility asset, understanding Bitcoin's fundamentals is essential for anyone tracking prices in AUD. The live price above is in Australian Dollars and is updated with each site refresh.

Bitcoin is a decentralised digital currency that enables peer-to-peer transactions without banks or governments acting as intermediaries. It runs on a public blockchain — a distributed ledger maintained by a global network of computers.

Anyone can send BTC to anyone else in the world, and the network confirms those transactions through a process called mining. Unlike fiat currencies issued by central banks, no single entity controls Bitcoin's supply or rules. Its value is determined by supply and demand in open markets.

Bitcoin uses a consensus mechanism called Proof of Work. Miners compete to solve a computational puzzle; the winner adds the next block of transactions to the blockchain and receives newly issued BTC plus transaction fees. New blocks are created on average every 10 minutes.

The difficulty of the puzzle automatically adjusts roughly every two weeks so that the average block time stays consistent even as more computing power joins or leaves the network. Transactions are secured by cryptography and become progressively harder to reverse as more blocks are built on top of them. The entire system is open-source and runs without a central administrator.

Bitcoin was introduced in October 2008 when the pseudonymous Satoshi Nakamoto published the whitepaper “Bitcoin: A Peer-to-Peer Electronic Cash System.” The network went live on 3 January 2009 with the mining of the genesis block.

Early milestones include the first real-world transaction in 2010 (10,000 BTC for two pizzas) and the rise and collapse of the first major exchange, Mt. Gox, in 2014. Successive halvings in 2012, 2016 and 2020 progressively reduced the rate of new supply.

Later milestones include the 2017 retail bull run, the 2020–21 institutional adoption wave, El Salvador adopting Bitcoin as legal tender in 2021, the approval of US spot Bitcoin ETFs in January 2024, and the fourth halving in April 2024, which cut the block reward to 3.125 BTC.

Bitcoin has a hard-coded maximum supply of 21 million coins. New BTC enters circulation only through mining rewards, which are cut in half approximately every four years — an event known as the halving. This predictable, disinflationary issuance schedule is a core part of Bitcoin's economic design and the reason it is often described as “digital gold.”

Because the vast majority of all coins have already been mined, each halving reduces the flow of new supply rather than the stock. The current circulating supply and market capitalisation are shown in the live pricing data above. Note that a meaningful share of mined coins is considered permanently lost (misplaced keys), so effective liquid supply is lower than the headline figure.

Australians can buy Bitcoin on several AUSTRAC-registered exchanges, including Swyftx, CoinSpot, Independent Reserve and others. Most support free or low-cost AUD deposits via PayID or bank transfer, and identity verification (KYC) is required before trading. Crypto is legal in Australia.

The Australian Taxation Office treats Bitcoin as a capital gains tax (CGT) asset, so capital gains tax may apply when you sell, trade or spend it. Always use reputable, registered platforms, enable two-factor authentication, and consider how you will store your BTC (exchange custody versus a personal wallet).

Bitcoin is highly volatile — double-digit percentage swings over days or weeks are common, and drawdowns of 50% or more have occurred repeatedly in its history. It produces no income and its price depends entirely on continued demand.

Regulatory changes, exchange hacks, lost private keys and broad market sentiment can all affect price. While the Bitcoin network itself has operated continuously since 2009, individual holders remain responsible for secure storage and for their own tax compliance. Never invest more than you can afford to lose.