Well as I see, big projects are implementing security task not just for hackers but also to secure the market price of their pairs. In that case, what they are doing is to limit the sell price. Investors is not allowed to sell below the ICO price. Some people gets annoyed about this because they think of their market freedom, but it is a good way to avoid the market price to be dumped.
I don’t think limiting sell price will be the solution, if they limit sell prices, yes, they will sustain the price for a while but at any little increase on the price of the ico, many of the investors will dump their coin immediately, at least it still profit them.
I think what they would have done is to limit the amount of coin an investor can have access to or purchase and also limit the total withdrawal that can be done within a time frame on a single transaction, after all, if not because project developers and investors too got it wrong, the coin was meant to be a utility coin and not investment coin.