Bitcoin (BTC)

Why Trust Techopedia

What is Bitcoin (BTC)?

The definition of Bitcoin (BTC) is a digital currency that operates on a decentralized network without the need for a central authority or intermediaries. It enables peer-to-peer (P2P) transactions worldwide, offering users financial autonomy and privacy. Bitcoin transactions are recorded on a public ledger called a blockchain, which uses cryptographic technology to ensure transparency and security.


As the first cryptocurrency, Bitcoin has paved the way for the emergence of numerous other digital currencies and blockchain-based applications.

Techopedia Explains the Meaning of Bitcoin (BTC)

Techopedia explains what Bitcoin is

Bitcoin, introduced in 2008 and launched in 2009, revolutionized the concept of currency by eliminating the need for traditional financial institutions. Unlike fiat currencies issued by governments, Bitcoin is not backed by any physical asset but rather relies on cryptographic algorithms for security and issuance.

One of the primary appeals is the decentralized nature of Bitcoin, meaning that no single entity controls the network, theoretically making it resistant to censorship and manipulation. Users can send and receive Bitcoin directly without the need for intermediaries, enabling fast and low-cost transactions across borders.

The underlying blockchain technology ensures the integrity of the network by recording all transactions in a transparent and immutable process. Instead of trusting a bank that an account has funds available to transfer, Bitcoin makes account information and transaction history public. This allows users to confirm the availability of funds before making a transaction.

The Bitcoin blockchain is based on a peer-to-peer (P2P) network that maintains a distributed ledger, and anyone can obtain a copy. Anyone can create a Bitcoin account or Bitcoin address, as there is no centralized approval process. The owner of the Bitcoin address is not recorded in transaction records, and the owner is not required to link real-world information to their account, making transactions private.

But Bitcoin is not completely anonymous. If public information can link someone to their Bitcoin address, then all their transaction can be linked back to them. Similarly, if a transaction can be traced back to an IP address, location information can be linked to a Bitcoin address. Therefore, Bitcoin is considered pseudonymous because a user’s identity is hidden, but it is not truly anonymous.

How Bitcoin Works

At its core, Bitcoin operates on blockchain technology, which serves as a decentralized and transparent ledger to record all transactions. When someone initiates a Bitcoin transaction, it is broadcasted to the network of computers (nodes) running the Bitcoin software.

Network nodes validate transactions using cryptographic algorithms. Each transaction is verified to ensure that the sender has sufficient funds and that the transaction adheres to the network’s rules. Validated transactions are grouped together into blocks.

Bitcoin operates using a Proof of Work (PoW) consensus mechanism. Miners, which are specialized nodes in the network, compete to solve complex mathematical puzzles to add these blocks to the blockchain. This process, known as mining, requires substantial computational power and energy consumption. The first miner to solve the puzzle and validate the block broadcasts it to the network. Other nodes in the network then verify the block and reach a consensus to accept it. Once a block is accepted, it becomes a permanent part of the blockchain.

Each transaction links to the next in the chain using a cryptographic hash. The hash is created using information from the transaction record it links to, creating a chain. This means that if any information in the record is changed, the link will no longer be valid.

This mechanism protects against fraud, by making the cost of creating fraudulent transactions much higher than the possible reward. Any alteration to a block, such as reversing a transaction, would require changing all subsequent blocks, which is computationally infeasible.

A chart showing how Bitcoin works

Source: Bitcoin

The decentralized nature of Bitcoin ensures that no single entity has control over the network. This decentralization mitigates the risk of censorship, manipulation, or single points of failure common in centralized systems.

As all Bitcoin transaction records and addresses are public, anyone can verify that a transaction was processed. This removes the need for a trusted intermediary to vouch for someone when making a transaction.

Who Created Bitcoin?

The concept of Bitcoin was introduced by an anonymous person or group of people using the pseudonym Satoshi Nakamoto. Nakamoto outlined the principles of Bitcoin in a whitepaper titled “Bitcoin: A Peer-to-Peer Electronic Cash System,” published in 2008.

In the paper, Nakamoto argued that the problem with current banking systems is that they rely on trust. Financial institutions act as trusted third-party intermediaries to process payments. The flaw of this system is that financial institutions cannot make non-reversible transactions. Because the financial institutions act as trusted intermediaries, they also have to mediate any disputes that arise over a transaction so they can reverse transactions.

Such a system requires a high level of trust in financial institutions and is expensive to maintain. It also requires users to submit a large amount of personal information as that information is used to establish trust. When Bitcoin was created, there was no way to make a digital payment more analogous to a cash transaction without a trusted party facilitating the transaction.

Nakamoto created Bitcoin to meet this need, explaining:

“What is needed is an electronic payment system based on cryptographic proof instead of trust, allowing any two willing parties to transact directly with each other without the need for a trusted third party. Transactions that are computationally impractical to reverse would protect sellers from fraud, and routine escrow mechanisms could easily be implemented to protect buyers.”

What Do I Need to Use Bitcoin?

To use Bitcoin, you need a digital wallet to store and manage your coins. Wallets can be software-based (hot wallets) or hardware-based (cold wallets). Hot wallets are connected to the Internet, making them convenient for frequent transactions, while cold wallets are offline, providing enhanced security against hacking attempts.

You can also trade and hold Bitcoin in accounts on centralized cryptocurrency exchanges.

What is Bitcoin Wallet

A Bitcoin wallet is a digital tool that allows users to store, send, and receive Bitcoin securely. Some of the most prominent crypto wallets consist of a public key, which is similar to an account number, and a private key, much like a password, which is used to access and manage cryptocurrency.

There are different types of wallets, including:

Software wallets

  • Desktop wallets: These wallets are software applications installed on a desktop or laptop computer. They offer a high level of security as the private keys are stored locally on the user’s device.
  • Mobile wallets: Applications designed for smartphones and tablets, allowing users to manage their Bitcoin on the go. They are convenient and accessible but may be less secure than desktop wallets because of the risk of loss or theft of the mobile device.
Hardware wallets

Physical devices that store the user’s private keys offline, offering the highest level of security against hacking and theft. They are typically USB-like devices with built-in security features, such as encryption and PIN protection.

Paper wallets

Physical documents that contain the user’s private and public keys printed or written on paper. Paper wallets are considered one of the most secure forms of storage as they are immune to online hacking attacks. However, they require careful handling to prevent loss or damage.

Online/web wallets

Online wallets are hosted on cloud servers and accessible through web browsers. They offer convenience and ease of use but are especially susceptible to hacking and security breaches if the hosting service is compromised.

Multi-signature wallets

Multisignature (multi-sig) wallets require multiple signatures (or keys) to authorize a Bitcoin transaction. This type of wallet enhances security by distributing control among multiple parties, reducing the risk of unauthorized access or theft.

Each type of Bitcoin wallet has advantages and disadvantages. When choosing a wallet, you should carefully consider security, convenience preferences, and risk tolerance. It is also essential to follow best practices for securing and backing up wallet data, such as using strong passwords, enabling encryption, and regularly updating software.

How to Mine Bitcoin

Mining Bitcoin requires significant investment in hardware, electricity, and time. As the network’s difficulty increases and the block reward diminishes with each halving event, mining has become increasingly competitive and resource-intensive. However, for those willing to invest in the necessary equipment and infrastructure, Bitcoin mining can be profitable.

To start mining Bitcoin, you need specialized hardware known as application-specific integrated circuits (ASICs). ASICs are designed specifically for mining cryptocurrencies and offer high computational power and energy efficiency compared to general-purpose computers. You also need mining software to connect the hardware to the Bitcoin network. These programs allow you to control your mining rig, monitor its performance, and manage your earnings. You also need a secure Bitcoin wallet to receive and store the bitcoins you mine.

You set up your mining rig by connecting your ASICs to a power source, configuring them to connect to the mining pool’s server, and optimizing their performance settings. Your mining hardware will continuously solve the network’s complex mathematical equations to find a valid hash value that meets the network’s difficulty target. If your rig succeeds in becoming the first to solve a puzzle, you will be rewarded with a newly minted Bitcoin, along with any transaction fees included in the block.

How to Use Bitcoin

Using Bitcoin involves purchasing Bitcoins through an exchange, receiving them as payment for goods or services, or mining them through computational power. Once acquired, BTC can be stored in a digital wallet and used to make transactions with merchants who accept Bitcoin as payment.

A chart describing how to use Bitcoin

Source: Bitcoin

To receive Bitcoin, you need to provide the sender with your Bitcoin address, which serves as your wallet’s public key. You can generate a new address for each transaction to enhance privacy and security. Once the sender initiates the transaction, the Bitcoin will be credited to your wallet once it is confirmed on the blockchain.

To send Bitcoin, you enter the recipient’s Bitcoin address and the amount you want to send in your wallet’s interface. You may also have the option to specify a transaction fee to speed up the confirmation process. Once you confirm the transaction, it will be validated by the network, and the Bitcoin will be transferred to the recipient.

You should keep track of your Bitcoin transactions using your wallet’s transaction history. You can view incoming and outgoing transactions, check their status, and verify confirmations on the blockchain. Some wallets also offer additional features, such as address labeling and transaction memos, to help you organize and manage your transactions effectively.

It is essential to protect your Bitcoin wallet and private keys from unauthorized access and potential security threats. Enable two-factor authentication (2FA), use strong passwords, and consider storing a backup of your wallet’s seed phrase or private keys in a secure location. Be cautious of phishing attempts and malicious software that may compromise your wallet’s security.

Bitcoin Pros and Cons


  • Decentralization
  • Transparency
  • Borderless
  • Financial inclusion
  • Lower transaction fees
  • Store of value
  • Financial sovereignty


  • Volatility
  • Security risks
  • Regulatory uncertainty
  • Irreversibility
  • Energy consumption
  • Scalability issues
  • Adoption challenges

Bitcoin Regulations

Bitcoin regulations vary by country, with some embracing it as a legitimate form of payment, while others impose restrictions. As Bitcoin is not tied to any country’s currency or subject to regulations, there is the potential for a criminal element to flourish, which has caused some countries to move to ban it and other cryptocurrencies outright. Regulatory efforts often focus on combating money laundering, terrorism financing, and protecting consumers from fraud.

The Bottom Line

The emergence of Bitcoin and other cryptocurrencies has revolutionized the financial industry, offering a decentralized alternative to traditional currencies.

While it presents opportunities for financial inclusion and innovation, it also carries risks and challenges that investors and users must navigate carefully.


What is Bitcoin in simple terms?

How much is $1 Bitcoin in US dollars?

What will BTC be worth in 2030?

What is BTC used for?

Is BTC a good investment?


Related Terms

Nicole Willing
Technology Journalist
Nicole Willing
Technology Journalist

Nicole is a professional journalist with 20 years of experience in writing and editing. Her expertise spans both the tech and financial industries. She has developed expertise in covering commodity, equity, and cryptocurrency markets, as well as the latest trends across the technology sector, from semiconductors to electric vehicles. She holds a degree in Journalism from City University, London. Having embraced the digital nomad lifestyle, she can usually be found on the beach brushing sand out of her keyboard in between snorkeling trips.