More than 90 % altcoin are scam. So be very careful. Do you know how to find a good altcoin?
A good coin must meet the following conditions
1.It should have universal application not limited to specific small markets.
2.It should be market oriented mean should have some practical usage like XRP payment transfer feature.
3.Should fill technical gap as XRP fill payment transfer facility.
4.Usability and Scalibilty improved.
5.Acceptance by large companies and communities.
These are some of the factors which may prove useful while evaluating a coin.