Summary

Mining is the process of verifying Bitcoin transactions and adding them to the blockchain. The goal of miners is to find valid answers to complex mathematical problems. Miners who successfully solve the problem will be rewarded with new Bitcoins and transaction fees.

In the early days, Bitcoin users could join the mining competition using their personal computers. Today, mining profits can only be obtained by relying on extremely professional mining machines. It is difficult to make a profit from mining on a single machine, so many miners choose to join mining pools to increase the probability of obtaining block rewards (the rewards are shared proportionally by the members of the mining pool).

Introduction

Bitcoin mining ensures that the blockchain records the latest legitimate transactions. At the time, it was a unique solution to create trust in a trustless environment. In this sense, mining is the core of Bitcoin's security model.

Getting Bitcoin rewards through mining sounds like an attractive deal. The days of using computer CPUs for mining are gone, but physical mining machines are not necessary to participate in mining. Before deciding whether to participate in mining, let's briefly discuss the principles of Bitcoin mining.

What is Bitcoin Mining?

When a user creates a new Bitcoin transaction, it needs to wait for other network users (nodes) to verify and confirm its validity. Miners are responsible for collecting new pending transactions and centralizing them into candidate blocks (new blocks waiting for verification).

The goal of a miner is to find a valid block hash for a candidate block. A block hash consists of a string of numbers and letters, which is a unique ID that distinguishes different blocks. Here is an example of a block hash:

0000000000000000000b39e10cb246407aa676b43bdc6229a1536bd1d1643679

In order to create a new block hash, miners need to collect the hash of the previous block, the data of the candidate block, a random number and substitute them all into the hash function.

However, miners must find a random number that combines all the data to generate a block hash that starts with a specific number of zeros. The number of zeros varies with the difficulty of mining. If the block hash is valid, it proves that the miner has completed the necessary work to verify the candidate block (i.e., proof of work).

After collecting pending transactions and creating candidate blocks, miners can only change the random number - this is how mining works. In an intensive trial and error process, the miner keeps changing the random number and hashing the combined data multiple times until it finds the solution for the block (that is, the hash value that starts with a certain number of zeros).

Once a valid hash value is found, the miner can verify the candidate block and claim the Bitcoin reward. At this point, the blockchain transactions in that block move from “pending” to “confirmed.”

How much can Bitcoin miners earn?

Each new block brings a block reward to the miner, which is composed of newly generated Bitcoins (block subsidy) and transaction fees. The block reward comes almost entirely from the block subsidy, so most people directly regard the block subsidy as the block reward (ignoring transaction fees).

In 2009, the initial block subsidy for Bitcoin mining was 50 Bitcoins, and the reward was halved every 210,000 blocks mined (about four years). These halving events caused the mining reward to drop to 25 Bitcoins in 2012, 12.5 Bitcoins in 2016, and finally to 6.25 Bitcoins in 2020. The next halving event is expected to occur in 2024. As of May 2021, miners will receive a block reward of approximately $300,000 per block mined.

However, there are still many factors to consider when evaluating mining equipment and profitability. Among them, the speed at which the mining machine generates and tests random numbers is a key indicator. This value is called the hash rate, and it is the key to the success of Bitcoin miners. The larger the hash rate, the faster it can test random inputs.

Another important indicator is the energy consumption of the mining machine. If the electricity cost is greater than the mining income, there will be no profit.

A Beginner's Guide to Bitcoin Mining

Decentralization and open source are two major features of Bitcoin, so everyone can join the mining competition. In the past, you could participate in the mining of new blocks using your personal computer. As the mining difficulty increases, more high-performance computers will be put into use (see below for details).

In theory, personal computers can still participate in Bitcoin mining, but the chances of finding a valid hash value are extremely small. Hash functions are calculated relatively quickly, but it takes longer to calculate a large number of random inputs. Therefore, the premise for miners to achieve profitability is to have professional hardware.

Which mining equipment should I use?

Generally speaking, cryptocurrency mining can use CPU, GPU, FPGA or ASIC miners (which will be introduced later). At present, some altcoins can be mined using graphics cards (GPU). Considering the mining algorithm, difficulty and electricity costs, FPGA miners can also be an option. But for Bitcoin, ASIC miners are the most efficient equipment.

CPU (Central Processing Unit)

The CPU works like a multi-function chip that commands different areas of a computer, but its efficiency is no longer sufficient for cryptocurrency mining.

GPU (Graphics Processing Unit)

GPUs have many uses, but are basically used only to process graphics and output to the screen. GPUs divide complex tasks into several subtasks, thereby improving performance. Some altcoin mining can use GPUs, but the efficiency depends on the mining algorithm and difficulty.

FPGA (Field Programmable Gate Array)

FPGAs can be programmed and reprogrammed to serve different functions and applications. Such devices can be customized and are more cost-effective than ASICs, but they will reduce the efficiency of Bitcoin mining.

ASIC (Application Specific Integrated Circuit)

ASIC stands for Application-Specific Integrated Circuit, which means these computers are designed for a single purpose. ASIC miners are devices tailor-made for cryptocurrency mining. Although less customizable than FPGAs and more expensive, the hash rate and energy consumption levels make ASICs the most efficient choice for Bitcoin mining.

Mining Pools

The probability of mining a block alone is extremely small, but joining a cryptocurrency mining pool allows you to combine your computing power with other miners. When the mining pool successfully mines a block, the mined Bitcoin will be shared by all miners. The mining pool reward is proportional to the mining power contributed by the individual.

How to join a mining pool?

When joining a mining pool using local hardware, you must configure your personal software to work with other miners. This process usually involves registering an account and connecting to the pool server.

If you already have a miner, Binance Pool is the ideal choice for mining Bitcoin and other SHA-256-based tokens. To maximize your earnings (paid in Bitcoin), miners will switch freely between BTC, BCH, and BSV.

For more information on earnings, please visit the Binance Pool page. Bitcoin earnings will be transferred to your Bitcoin wallet on a daily basis.

Cloud Mining

If you want to stay away from the tedious technical operations, you can also join a cloud mining farm and let the mine owner take care of the software and hardware. In a broad sense, a cloud mining farm usually means hiring someone to mine on your behalf for money. The mine owner will take a certain percentage of the revenue as a reward. However, this method is very risky and there is no guarantee that the investment will pay off. What's worse is that many cloud mining farms are scams themselves, so you must be cautious.

Summarize

If you understand the basics of how Bitcoin mining works, you can avoid mistakes. With the right combination of hardware and software, anyone can participate in mining and contribute to the security of the Bitcoin network. Even if you find that mining is not for you, you have contributed to the operation of a Bitcoin node.

Profiting from mining is challenging, the initial investment is high and there are many risks involved. The ultimate return will also be affected by market conditions and external factors such as energy prices and hardware improvements. Before investing in a mining machine, be sure to think twice and do your research carefully.