You sell every premine coins in the ICO and keep little amount for giveaway (like 500k). After that, dyou (devs) invest Massively in the ICO so you can be rich. Anyway, when we read you, there is no possibility that the coin value drop after ICO.
this is just pure FUD, devs investing their own ICO is the biggest scam and worst thing any investor would want. all we would be doing is paying ourselfs BTC, while in the process diluting everyone elses share of ico.
think the best idea would be to add .5 million coins to ico for each 1000 coins raised. so instead of new investors diluting the total, new investors will be growing the total.