From Bitcoin to Dogecoin: Revealing How Mining Algorithms Affect Your Earnings

When it comes to cryptocurrency mining, many people find it mysterious and distant. In fact, to understand why different coins choose different mining algorithms, you only need to grasp one core logic: the algorithm determines what hardware you need, how much you need to invest, and how much you can earn.

From Bitcoin’s SHA-256 to Dogecoin’s Scrypt, and to Ethereum Classic’s Ethash, each mining algorithm is like a set of rules for a “math competition.” Today, we’ll explore the secrets behind these algorithms from a practical perspective.

The Essence of Algorithms: Why They Are the “Engine” of Mining"

What exactly is a mining algorithm? Simply put: It is a set of mathematical rules that specify how miners verify transactions, package blocks, and earn rewards.

Think of each algorithm as a special “lock”:

• Bitcoin’s SHA-256 lock requires specialized tools (ASIC miners) to crack quickly, with very high costs and high returns.
• Dogecoin’s Scrypt lock is friendly to common tools (GPU graphics cards), allowing ordinary people to participate, but with relatively moderate competition.
• Ethereum Classic’s Ethash lock is designed to prevent monopolization by professional tools, encouraging users to mine with graphics cards.

This is why different coins require different mining algorithms.

Why Do Cryptocurrencies “Choose Different Algorithms”? Three Core Reasons

Since Bitcoin’s inception in 2009, the crypto ecosystem has evolved dozens of mining algorithms. This isn’t random; there’s deep logic behind it:

First reason: Hardware Compatibility Strategy

SHA-256 relies entirely on computational power, suitable for ASICs. Scrypt, on the other hand, requires large memory, making GPUs more efficient. RandomX (Monero’s choice) maximizes the advantages of ordinary CPUs. When projects choose algorithms, they also decide who can participate in mining.

Second reason: Preventing Oligopoly

If all coins used SHA-256, ASIC manufacturers could monopolize the market. To protect decentralization, many projects deliberately choose ASIC-resistant algorithms (like Scrypt, RandomX, Ethash), allowing more retail miners to participate rather than being controlled by a few large pools.

Third reason: Network Security and Features

The complexity of an algorithm directly affects attack costs. Bitcoin’s SHA-256, with its enormous network hashrate (over 800 EH/s as of 2026), makes attacks prohibitively expensive. New projects can use different algorithms to build their own security defenses.

Mainstream Mining Algorithms Explained: From Security Fortresses to Friendly Options

SHA-256: Bitcoin’s “Crown” Algorithm

What is it: A cryptographic standard designed by the US NSA, proven to be the most secure choice today. Bitcoin uses it as the basis for its PoW consensus.

Hardware requirements: Only ASICs can handle it efficiently. These specialized devices cost from a few thousand to over a hundred thousand RMB, with annual electricity costs exceeding ten thousand RMB.

Suitable for: Well-funded professional miners or mining farms with cheap electricity. For ordinary individuals, it’s often unprofitable.

Security: Unmatched. Bitcoin’s network has become so large that any attack would cost an astronomical amount.

Scrypt: The “Everyman’s Choice” for Dogecoin and Litecoin

What is it: Designed to prevent ASIC monopolies, emphasizing memory consumption over pure computation.

Hardware requirements: High-end GPUs can handle it well, costing about 1/10 of an ASIC miner.

Block times: Litecoin produces a block every 2.5 minutes; Dogecoin every minute. You can confirm earnings more frequently.

Value-added potential: Dogecoin supports “merged mining” with Litecoin, allowing a single miner to mine both coins simultaneously, doubling earnings.

Suitable for: Budget-conscious beginners or hobbyists wanting to try mining. But be aware: ASICs are gradually penetrating the Scrypt space, slowly diminishing GPU advantages.

Ethash: Ethereum Classic’s “Graphics Card Paradise”

What is it: Designed to be ASIC-resistant, requiring the calculation of large dynamic data sets (DAG files).

Hardware requirements: High-performance GPUs. The DAG file size reached 6-8GB by 2026, requiring compatible graphics cards.

Block time: About 15 seconds per block, the fastest among the three algorithms.

Risks: The DAG file continues to grow, eventually exceeding the memory capacity of mainstream GPUs, rendering hardware obsolete.

Suitable for: tech enthusiasts with high-end GPUs wanting to experience a different mining approach from Bitcoin.

RandomX and X11: Diversification and Exploration

RandomX (Monero): CPU-friendly, designed to prevent ASICs, encouraging participation with regular computers. However, returns are relatively low.

X11 (DASH): Combines 11 hash functions, balancing security and energy efficiency, supporting both GPUs and some ASICs.

Hardware Costs vs. Rewards: Which Path Should You Take?

This is the most practical question. Choosing an algorithm is essentially choosing your investment return cycle.

(Note: Based on industry data as of 2026; actual fluctuations are common.)

The Future of Mining: Evolution of Algorithms

Energy Efficiency Revolution: Doubling Computation per Watt

As chip manufacturing advances to 3nm and beyond, future algorithms will emphasize performance per watt. New algorithms may reduce redundant calculations, extend hardware lifespan, and lower depreciation costs.

Increasing Resistance to ASICs

More projects will adopt dynamic hash functions or periodically change algorithm parameters, making ASIC development costly and protecting retail miners’ participation.

Green Mining Becomes Standard

In 2024, over 54% of Bitcoin mining uses renewable energy. Future algorithms might include “flexible scheduling” features, automatically adjusting mining power based on renewable energy availability, making mining more eco-friendly and cost-effective. This allows farms to utilize cheap energy sources fully, benefiting retail miners too.

Balancing PoW and PoS

Ethereum’s “Merge” in September 2022 reduced energy consumption by 99.95%. However, PoW’s security and censorship resistance remain hard to replace. Hybrid consensus models (PoW + PoS) may emerge, combining the decentralization of PoW with energy savings.

How to Choose Your Mining Algorithm

Returning to the initial question: Which algorithm should I choose? It depends on four factors:

1. Your initial budget

• A few thousand RMB? Consider Scrypt or RandomX.
• Tens of thousands RMB and cheap electricity? SHA-256 might be suitable.
• Moderate budget and want to preserve value? Ethash could be a good choice.

2. Your electricity costs
Bitcoin requires at least 1–2 RMB/kWh to be profitable; Dogecoin might be unprofitable above 4 RMB/kWh; Ethereum Classic breaks even around 3 RMB/kWh. Know your actual electricity price.

3. Your risk tolerance
Bitcoin is the most stable but expensive to enter; Dogecoin is more flexible but volatile; new algorithms may offer higher returns but come with higher project risks.

4. Your participation timeframe
Short-term profit? Choose high-yield options (Scrypt). Long-term stability? Go for the most reliable (SHA-256). Experimental? Try cutting-edge algorithms.

Conclusion

Cryptocurrency mining algorithms are more than cold math—they reflect each project’s thoughts on “who can participate,” “how to maintain decentralization,” and “how to balance security and efficiency.”

Understanding these differences allows you to choose the right path based on your situation. Whether you’re pursuing Bitcoin’s “digital gold” dream or joining Dogecoin’s “everyman’s mining,” knowing the essence of these mining algorithms is the first step toward smart investing.