In the new AI gold rush, startups aren't raising money every year; they're raising massive rounds every month. Perplexity, the buzzy AI search challenger to Google, has become the poster child for back-to-back fundraising, facing investor demand at valuations from $14 billion to as high as $50 billion in just a few months, Business Insider has learned. The frenzy is fueling investor FOMO — and fears of a modern-day bubble. Perplexity and its peers are buoyed by AI juggernauts like OpenAI and