Yes, it is true that some ICO are not scam but majority of the ICOs are scam. Out of one hundred percentage, i can say that less than 30% of ICOs are true or are successful. I think it is important to note that investing in cryptocurrencies and Initial Coin Offerings ("ICOs") is highly risky and speculative. One therefore need to be very careful in dealing with any ICO or crypto currency and should be to accept any risk that may occur along the line.