I think this is a misinterpretation. If you are the market leader and have huge profits you can enter such a market at any time. It just costs more and more the

I think this is a misinterpretation. If you are the market leader and have huge profits you can enter such a market at any time. It just costs more and more the stabler the market becomes, which in turn of course also decreases the risks and costs of development. The art is finding the sweet spot to enter, and beating the competition that's already in the market and tries to keep you out.