Bitcoin fell 5% on December 15, 2025, as traders anticipated a potential interest rate hike by the Bank of Japan at its upcoming meeting on December 19. The speculation has led to the unwinding of yen carry trades, prompting asset sales including Bitcoin. Historically, Bitcoin has shown sharp corrections following rate increases by the Bank of Japan. The current market behavior suggests Bitcoin is increasingly behaving like a high-beta security, reflecting its growing integration into diversified portfolios rather than acting as a traditional safe haven asset.