Bitcoin closed 2025 at $88,000, marking a 6% decline from the start of the year. Despite reaching a peak of $126,200 in October, the cryptocurrency saw stagnant blockchain activity, with total transactions dropping 20% year-on-year to 152 million. Daily transaction volume averaged $10 billion, while unique addresses fell to 480,000 by the end of the year. Miner revenue also suffered, hitting $210,000 per day, the lowest since 2020, with profitability at $35 per PH/s, a 45% decrease from July. These trends suggest that Bitcoin price prediction models may need to adjust for the slowdown in on-chain activity.