Bitcoin price swings dominate ROI. Late 2024 saw BTC exceed $100,000, boosting mining profits, but 2025 corrections reduced margins, with some miners shutting down as revenue fell below energy costs. ROI formula: (Revenue - Costs) / Initial Investment × 100%.
Trend Analysis: BTC volatility remains high (30%-50% annually). 2025 prices may fluctuate due to macroeconomic factors (e.g., Fed policies) or regulations. ROI Outlook: Profitable if BTC stabilizes at $80,000-$100,000; below $60,000, high-cost miners face losses.