I have said it so many times in these forums. Growth companies don't make a profit, because they reinvest that money into more assets that will generate more money in the future than what those assets cost to obtain. It's when they start having money sitting in the bank that you need to start to worry. That means that they've ran out of good ideas. Then you see a sideways share price, then you see the company start to lose revenues as they lose relevance in the marketplace.