Bitcoin's price fell below $90,000 on Thursday, reaching a low of $87,634.94, amid concerns over a potential interest rate hike by the Bank of Japan. The cryptocurrency later rebounded to $89,623.51. Michael Saylor, CEO of MicroStrategy, hinted at a possible new Bitcoin acquisition, updating his SaylorTracker with the phrase "₿ack to More OrangeDots." The Bank of Japan's rate decision, expected on Friday, has a 97% probability of a 25-basis-point increase according to Polymarket. MicroStrategy's last Bitcoin purchase was on December 8, acquiring 10,624 BTC for $963 million, bringing its total holdings to 660,624 BTC at an average cost of $74,696. Altcoins may experience volatility if Bitcoin breaks key levels ahead of the central bank's announcement.