ICO's are booming and it looks like it never ends. But what if all ideas are gone and the amount of new coins which use/ need ETH are decreasing. Would this have much effect on the price?
Currently ICOs are definitely the #1 reason on why ETH is being used, besides using it for trading. The thing is, as long as people are willing to offer up ETH to ICOs, then I don't think ICOs are going anywhere. They're making good money even without a working product. But yea, if ICOs were to stop, ETH will definitely go lower in price, unless there's some huge ETH update that makes it very useful or something along those lines.