As you’re validating your problem and solution, ask yourself whether there are enough people who really care enough to sustain a 5% growth rate — but don’t strive for that rate of growth at the expense of really understanding your customers and building a meaningful solution. When you’re a pre-revenue startup at or near product/market fit, your line in the sand should be 5% growth for active users each week, and once you’re generating revenues, they should grow at 5% a week.