Venture investor Byron Deeter reveals why founders should think like athletes, how ethical AI shaped Anthropic's billion-dollar bet, and why CEOs collapse under stress. The Bessemer partner managing $20B in capital—including 26 unicorns—shares lessons from founding a cloud software company before venture, his anti-portfolio strategy, and a wellness program teaching peak performance to startup leaders. Founders who stay longer in their journey unlock irreplaceable product insight and founder magic; hiring a replacement CEO early destabilizes product risk and should only happen jointly or as a last resort.