When is better to buy crypto, on pre sale or on ICO? When you buy on presale, you can get good bonuses, however when you buy on ICO you have a better gurantee not to be scammed.
Dont forget that at presale you need to invest bigger minimum ammount. If you belive in project and made a good analysis it's better to enter at presale, if you have doubts, better at ICO when project posibilitys are clearly visible.