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.
Personally, I think I would choose to participate in pre-sales that give more bonuses, and the lowest price. However, if we join to invest in ICO, we must be prepared if the project fails. Because not all ICOs can be successful so it is wise to investigate occasionally before entering ICO.