If you want to see whether a startup is healthy or not, don't just focus on turnover that looks large. There are some numbers that are much more important to pay attention to, especially cash runway, burn rate, gross margin, revenue growth, and cash flow. The cash runway shows how long the company can survive with the available money, while the burn rate shows how quickly the company runs out of money each month. A startup that is growing revenue quickly but continues to burn cash without a clear plan could still be in dangerous shape.
In addition, the relationship between the cost of acquiring a customer and customer value is also important. Customer Acquisition Cost or CAC needs to be compared with Customer Lifetime Value or LTV to see whether customer growth really results in healthy business economics. Gross margin also needs to be considered because high turnover doesn't mean much if most of the income is spent on direct costs. In my opinion, the most important indicator is not one particular number, but a combination of growth, profitability, cash flow, and the startup's ability to survive until the business model is truly strong.