Bitcoin has risen as a major player in the crypto world. It is a huge chain that supports millions of users and billions of transactions. Many supporters of the project cite decentralization as a reason for adoption.
However, the project might not be as decentralized as some may say. This begs the question: Is Bitcoin actually decentralized?
Understanding Bitcoin
Created in 2008 by the anonymous Satoshi Nakamoto, much of the hype surrounding crypto stems from Bitcoin. It was the first cryptocurrency to make a name for itself.
Bitcoin is a peer-to-peer network that operates on its own blockchain. This means that you can send Bitcoin tokens to any individual across the globe through the Bitcoin network. This is possible through the use of wallets, which are a way for individuals to store crypto.
Millions of transactions on Bitcoin’s blockchain need to be verified to prevent fraud and maintain order on the chain. Currently, Bitcoin relies on a proof of work system to verify these transactions in a decentralized way.
How Bitcoin Mining Works
Proof of work is a system that uses computing power to decide which transactions are legitimate. Anyone across the globe can contribute computing power to the chain and help verify transactions. Those who contribute computing power are called “miners” and are given rewards for doing so.
Every 10 minutes, a “block” is uploaded to Bitcoin’s blockchain. The miners that verify transactions in that time frame will receive Bitcoin for compensation. This is called the block reward. All of the transactions are placed into an irreversible and immutable ledger.
Proof of work contributes to decentralization because it allows anyone with the necessary resources to contribute to the chain. There is no single entity or group that controls the chain. And, transactions can be verified by anyone across the globe. However, if one group controls too much power on Bitcoin’s network, it can be problematic.
The Risk of a 51% Attack
A 51% attack can occur when one single group of miners controls more than 50% of the chain's computing power. If one group controls a majority of the computing power, they can “attack” the chain. This would allow the group to stop all transactions on the chain and “double-spend” tokens. This means that they could send a coin and then reverse it without verifying it.
While a 51% attack could prove damaging, if not fatal to the Bitcoin chain, it has not happened. There is a high probability that it will never happen. This is because the energy and computing equipment required to own 51% of the Bitcoin network’s computing power is nearly impossible for a single group to attain.
However, there is some worry about mining pools going rogue and committing a 51% attack.
The Role of Mining Pools
Mining pools are a way for miners to receive more predictable rewards for verifying transactions. Currently, 6.25 Bitcoin tokens are distributed every 10 minutes as the block reward. While this may seem like a lot, when it is distributed amongst miners it provides very little, if any, returns for a majority of miners.
Mining pools combine the computing power of many individuals to consistently receive block rewards. Because they take up a larger portion of the total computing power, they can receive consistent and predictable rewards. While this helps individual miners, it can detract from the decentralization of the Bitcoin network.
When you join a mining pool, you essentially give your computing power to the pool. This means that a single group can control a large portion of power on the Bitcoin chain.
If one pool were to ever attain 51% of the chain’s computing power, they could execute a 51% attack. Luckily, the largest pool, F2Pool, only owns around 15% of the total computing power, a far stretch from the 51% needed.
It’s also likely that miners that use pools will stop using these pools if the platform decides to attempt a 51% attack. Those who see this malicious behavior can remove themselves from the pool, lessening the proportion of computing power that pool has.
Comparing Decentralization Across Cryptocurrencies
Simply put, Bitcoin is far from being the most decentralized cryptocurrency. Its mining and mining pool system allows single groups to own large portions of the computing power on the network.
Other tokens use different systems to verify transactions that promote decentralization, such as sharding and proof of stake. These systems spread power on the blockchain across many more individuals and limits the amount of power one group can have.
However, there are many cryptocurrencies and projects that are much more centralized than Bitcoin. Bitcoin offers a peer-to-peer network, which is something not all projects offer. It is also the largest project with ownership spread across the globe. Because of its size, it is undoubtedly decentralized, but there are some other projects that offer a higher degree of decentralization.
How to Purchase Bitcoin
Bitcoin is the most popular cryptocurrency, with an average daily trading volume of over $32 billion. Because of this, it’s very easy to buy. The coin is offered on all of the major crypto brokerages.
Opening an account on a major crypto brokerage is very simple and typically only requires an email or phone number and a funding source. eToro, Webull and Coinbase are popular crypto brokers due to their simplicity, security and focus on education.
However, each broker is slightly different, so make sure to do some research to decide which exchange is the best for you. If you're ready to explore digital asset trading, you can view real-time trading platforms for more information.
Impact of China’s Bitcoin Ban
In September 2021, China reiterated a ban on all cryptocurrencies. They cited the possibility of fraud for their decision. This caused many miners to leave China and pursue mining in other parts of the globe. Before the ban, about half of all computing power was concentrated in China alone.
Because the miners were forced to leave China, this allowed the computing power on the Bitcoin chain to be more evenly distributed across the globe. This furthers the decentralization of Bitcoin, as the computing power is no longer concentrated in one geographical location. Instead, miners are more evenly spread around the world. This limits the power and control any single country or location can have on the network.
Frequently Asked Questions
How long does it take to mine one Bitcoin?
On average, it takes about 10 minutes to mine one Bitcoin. However, this refers to the block time - the actual process of earning a full Bitcoin through mining takes much longer and depends on the miner's computational power.
What makes a cryptocurrency truly decentralized?
A truly decentralized cryptocurrency has no single point of control or failure. Key factors include distributed network nodes, diverse geographical distribution of miners or validators, open-source development, and community governance rather than corporate control.
Can Bitcoin become more decentralized in the future?
Yes, Bitcoin can become more decentralized through technological improvements, broader geographical distribution of miners, and increased individual participation in network operations. Some proposals include alternative consensus mechanisms and improved mining accessibility.
How do mining pools affect Bitcoin's decentralization?
Mining pools concentrate hashing power under single entities, which potentially reduces decentralization. However, miners can switch pools freely, and no single pool has achieved majority control, maintaining a balance in the network.
What are the alternatives to proof-of-work for decentralization?
Proof-of-stake, delegated proof-of-stake, and other consensus mechanisms offer different approaches to decentralization. These systems typically use token ownership or voting systems to validate transactions rather than computational power.
How does Bitcoin's decentralization compare to traditional financial systems?
Bitcoin operates without central authorities like banks or governments, making it fundamentally more decentralized than traditional financial systems. However, aspects like mining concentration and development influence create different centralization pressures worth monitoring. For those interested in participating in decentralized finance, you can explore more strategies for engaging with digital assets.