I also think that pre-ICO bonuses over 40% are too high and raise a red flag, but sometimes even an ICO that is 2x the pre-ICO price can be a very good investment. Sure buying at pre-ICO price would be better, but if it is a solid project with a good use case, a great team, a working prototype and a reasonable market cap it can be worth it.

Looking back, there are plenty of tokens out there that would be amazing investments if bought at 2x ICO price