Novo Nordisk just suffered its worst day in history, losing over $100 billion in market value after Wegovy sales plunged. With over 1 million Americans turning to off-brand knockoffs, profits are evaporating — and lawsuits are flying. Novo has slashed its 2025 forecast again, leaving investors to wonder: is this just a bump in the road, or is the entire weight loss drug industry about to unravel?