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Isn't an Initial Coin Offering (ICO) a surefire way to make tons of money?
Given your premise is correct:  How do you cash in a large sum of YetAnotherCryptoCoin shortly after it´s ICO? The crypto-exchanges take some time to add a new currency, if they do at all. And even if they already have, trading volume is usually low.  I think that´s what really makes it unattractive for Investors as opposed to tec-enthusiasts (aside from the high volatility). Total lack of any reliable trading capability.