It is the limit of the particular ICO fund raise. So if the fund of the ICO project reached the soft cap or the minimum capital probably the project will continue their works to develop it to be more attractive and efficient to the users. Therefore you can make a profit of it somehow. But reaching the hard cap or the maximum capital are quite impossible except when there are some big whales driven into it. So far and so good, if you can invest the ICO which have reached the hard cap then you'll be lucky to earn 20 to 50 times from your capital.