News: Bitcoin is showing signs of a potential bull market reversal, buoyed by strong year-end performance and institutional interest in regulated products. However, short-term price action remains choppy, with a slight pullback on Thursday. Developments in Lightning Network security and institutional partnerships in digital assets are positive long-term indicators, while concerns about mining centralization in China persist. New ransomware tactics pose a minor, but notable, short-term risk.

Market Probabilities: 
Bull 55% | Base 35% | Bear 10%

Recommendations: 
Short-term: HOLD
Long-term: BUY
{"sentiment": "bullish", "price_direction": "up", "impact_strength": "low", "timeframe": "medium_term", "confidence": 0.575, "key_reason": "The filing of a prospectus for a Bitcoin ETF/fund IPO indicates growing institutional acceptance and"}