It is because, as an entrepreneur who wants to manage and grow a project in a big and enormous way, you should study the market and the people who will going to have an interest in your project. Basically, if an ICO is posponed, the reason behind this is that, their initial study about how the project will going to be done is affected by some outside factors that has a greater possibility of inducing negative effects on the project. As a result, they postponing it and they're trying to find the right time when, the project will become effective.