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.
True that is the big difference but will you really buy at pre sale without even knowing the capability of one ICO?
Of course you will do some research and questioning for starters. Reading the whitepaper is also the key for it.
Team members researching and looking at the best website of their profile and information.
I think those are the basic steps before investing in an ICO.