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.
If you buy it from ICO, no guarantee that is not a scam ICO. Even peoples who buy in the ICO can be scammed.
The different of presale and main sale is the bonus and the minimum contribution. If you are sure the project is real,
you can buy it on pre sale to get more, but it require more funds to buy.