More than 90 % altcoin are scam. So be very careful. Do you know how to find a good altcoin?
You can easily find best ICO based upon below link.
https://coinmarketcap.com/You can find best altcoins based upon the ranking. These are all reliable coins. So dont bother about scam, I had a experience in top 10 altcoins. But if you are going to invest better choose less than $1 coins. Hope these coin will improve soon. Also now the market price are very low. you can choose your right coin.