some investors prefer to buy tokens on the exchange because they will avoid fraud. But, the price may be higher than the price at the ICO. Here, either buying in ICO or exchanging will give positive and negative sides. Try to think about what you think is better. and buying coins as long as the ICO will direct you to know exactly how the ICO project is. In addition, many investors buy tokens or coins during the ICO to get some bonuses at a lower price