TL;DR Watching Dragons' Den is entertaining, but it’s also a masterclass in common business mistakes. Many entrepreneurs fail because they don’t know their numbers, run insolvent businesses, wildly overvalue their companies, neglect marketing and customer acquisition, or build products for markets that are simply too small. The lesson is simple: know your financials, validate your market, control your costs, and prove there’s real demand before asking investors for money. You

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