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.
it is very difficult to be sure, if you dare to risk it is better to buy before sale, to get more coins. this will be very profitable when the sale goes. but will suffer huge losses if it fails. so I think it's safer to buy when the sale begins.