This should be the answer... MicroStrategy has been actively and consistently buying a large amount of Bitcoin over the past week. This counts as real, substantial demand (as opposed to short-term trading for arbitrage), and there are no major bearish factors in the short to medium term, which has driven the market makers' slow push upward. Previously, it was thought that this kind of movement included the overall decrease in the cost of opening positions for contract short sellers (taking profit on high shorts + chasing shorts at lower levels), which inherently creates a short squeeze demand. Later, it was further amplified by the magnetic pull near the maximum negative gamma of 75,000, creating resonance.