Recently it did not become favorable to buy tokens on ico. After entry into the exchange all of them equally go down in price. So it is possible to wait for an exit and to buy at lower price.
Agree, its better to wait for it to list on exchange instead buying on ico time.. Because we cant predict nowadays if the ico project will success or not... Even if ico ended but still some of them have difficulties in listing their project on exchanges till the time even the project reached SC/HC it will turned into scam or failed project...