[Opinion: Bitcoin's return to $90,000 driven by technical factors, no new catalyst observed] BlockBeats News, December 29, Presto Research researcher Rick Maeda stated, 'Bitcoin's return above $90,000 is primarily driven by technical factors rather than any single new catalyst. The $90,000 level was previously a significant resistance point, and once Bitcoin regained stability above it, it likely triggered short covering and momentum-driven buying.' Vincent Liu, Chief Information Officer of Kronos Research, expressed a similar view, stating that after a period of consolidation, Bitcoin rebounded at a technical support level, noting that 'key price levels have turned back into support levels.' Andri Fauzan Adziima, Head of Research at Bitrue, commented that Bitcoin's upward momentum reflects technical relief from options expiration and correlations driven by altcoin dominance. He further added that Bitcoin has 'largely fluctuated within the $86,500 to $90,000 range in December,' weighed down by over $1 billion in ETF outflows related to tax-loss harvesting and broader de-risking. (The Block)