By Angus Berwick and Tom Wilson (Reuters) – On Tuesday morning, Sam Bankman-Fried, owner of cryptocurrency exchange FTX, caught his employees off-guard with a somber message. “I’m sorry,” he told them. “I fucked up.” The reason for the mea culpa: His announcement half an hour earlier that FTX’s arch-rival, Binance, planned to mount a shock takeover of its main trading platform to save it from a “liquidity crunch.” Binance founder Changpeng “CZ” Zhao, whom the billionaire had accused of sabotage, would now be his White Knight. The seeds of FTX’s downfall were sown months earlier, stemming from …