Cryptocurrency mining has evolved from a niche tech experiment into a viable financial strategy — especially for those living abroad who seek passive income with global exposure. As an overseas Chinese retiree based in Melbourne, I’ve spent the past year diving deep into the world of digital asset mining, focusing on mainstream value coins that offer both stability and growth potential.
In this guide, I’ll walk you through my hands-on experience with ASIC mining rigs, profitability analysis, strategic coin selection, and long-term holding tactics — all tailored for individuals looking to enter or optimize their presence in the crypto space.
Why Focus on Mainstream Value Coins?
When it comes to cryptocurrency, not all coins are created equal. My philosophy is simple: “From endless waters, take only one sip.” This means concentrating efforts on assets with proven track records, widespread adoption, and strong community consensus.
The core of my mining operation revolves around Bitcoin (BTC), Litecoin (LTC), and Dogecoin (DOGE) — three of the most established proof-of-work cryptocurrencies. These networks have survived multiple market cycles, regulatory shifts, and technological disruptions, making them ideal candidates for sustainable mining returns.
👉 Discover how to start earning passive income through efficient crypto mining strategies.
My Mining Setup: Five Antminer L7 Units
I purchased my first Antminer L7 on April 27 last year — exactly one year ago as of this writing. Encouraged by early results, I gradually expanded to a total of five L7 units, forming the backbone of my retirement-side mining operation.
Here’s a quick timeline:
- Unit 1: Online April 26
- Unit 2: Online May 10
- Units 3–5: Deployed陆续 over the following months
Total investment: approximately $50,000 USD, including equipment, setup, and infrastructure.
Each Antminer L7 specializes in Scrypt-based algorithms, making it perfect for mining Litecoin and Dogecoin — two coins that remain highly relevant despite market volatility.
Electricity costs in Melbourne account for roughly 50% of total mining expenses, which is manageable given stable local power rates and proper heat management in my garage setup.
One-Year Mining Performance: Results & ROI
After 12 months of continuous operation across five miners, here’s what I’ve achieved:
- Mined nearly 200 LTC (Litecoin), valued at ~$16,000 based on an average price of $80 per coin
- DOGE made up about 70% of total output, contributing significantly to overall volume
- Combined LTC + DOGE revenue: approximately $53,000 USD
- Net profit after electricity and maintenance: $25,500–$26,000 USD
That translates to a return on investment (ROI) of around 50% — far surpassing traditional financial instruments like bonds or savings accounts, where 15–20% returns are considered excellent.
And remember: this ROI doesn’t factor in potential future price appreciation during the next bull cycle. If I hold these assets until the next peak, my effective return could easily double or more.
With current Antminer L7 prices hovering around $6,000 per unit, I project next year’s ROI could reach 60%, assuming stable network difficulty and electricity costs.
Strategic Investment in CFX: A High-Potential Chinese Blockchain Project
Beyond mining, I’ve also allocated capital toward long-term holdings in promising ecosystems. One such project is Conflux (CFX) — recognized as China’s only officially supported public blockchain initiative.
I began buying CFX on January 1st at around $0.20 per token**. My average cost basis now sits between **$0.40–$0.50, after scaling in during market dips.
CFX briefly surged to $0.48**, though it currently trades at **$0.325. Even at this level, my unrealized gains represent a 7x to 8x return — impressive for less than a year.
I continue to hold and believe in CFX’s long-term fundamentals due to its unique position bridging China’s digital economy with decentralized technology. Rather than selling, I’ve chosen to stake CFX via a trusted validator node to generate additional yield.
Maximizing Returns with Staking: The ABC Pool Advantage
One of the smartest moves I’ve made is participating in PAS staking through ABC Pool, the largest staking node on the Conflux Tree Graph blockchain.
Staking allows you to earn passive rewards simply by locking up your tokens to support network security and governance.
Key Benefits of ABC Pool:
- Ranked #1 staking node on Conflux
- Supports both eSpace (EVM-compatible) and Core Space (native)
- Over 6 million tokens committed on eSpace, nearly 42 million on mainnet
- Offers annual percentage yields (APY) ranging from 13% to 30%, depending on chain usage
But there's more: ABC Pool enhances returns through token airdrops.
For every vote staked, participants receive 0.05 ABC tokens every 25 days — a powerful compounding mechanism.
When I first joined, ABC tokens were worth just $0.10**. Today, they trade at **$4.00 — a 40x increase. This dual-income model — staking rewards plus appreciating reward tokens — has dramatically boosted my portfolio performance.
I now stake all my CFX holdings via ABC Pool and plan to hold both CFX and ABC tokens through the next bull market.
👉 Learn how staking can turn your idle crypto into a high-yield income stream.
Frequently Asked Questions (FAQ)
Q: Is cryptocurrency mining still profitable in 2025?
A: Yes — especially when focused on efficient hardware like the Antminer L7 and low-cost electricity. Profitability depends on coin selection, energy costs, and market conditions. With smart planning, ROI can exceed 50%.
Q: Why choose Litecoin and Dogecoin over other altcoins?
A: Both use the Scrypt algorithm compatible with L7 miners, have strong communities, high liquidity, and lasting cultural relevance — particularly Dogecoin in social finance circles.
Q: What makes Conflux (CFX) different from other blockchains?
A: It’s uniquely positioned as a state-backed Chinese blockchain with hybrid PoW/PoS design, aiming to integrate into national digital infrastructure while maintaining decentralization.
Q: Is staking safe? Can I lose money?
A: Staking itself doesn’t risk principal loss if using reputable platforms like ABC Pool. However, market price fluctuations can affect overall value. Always do your own research before committing funds.
Q: How do I get started with mining or staking?
A: Start small — buy one miner or stake a portion of your holdings. Monitor performance, understand costs, and scale gradually. Use reliable exchanges and wallets to store assets securely.
👉 Start your journey into crypto mining and staking with trusted tools and resources.
Final Thoughts: Building Wealth Through Discipline & Insight
Digital asset mining isn’t a get-rich-quick scheme — it’s a disciplined financial practice combining technology, economics, and patience.
By focusing on mainstream value coins, investing in reliable hardware, and enhancing returns through strategic staking, I’ve built a self-sustaining system that supports my lifestyle in Melbourne.
Whether you're an expatriate seeking supplemental income or someone exploring modern investment models, crypto offers real opportunities — provided you approach it with knowledge and caution.
As I continue to explore developments in physical mining operations, the CFX ecosystem, and decentralized finance innovations, I’ll keep sharing insights that matter.
Stay informed. Stay committed. And let your assets work for you.