you cant be sure of an investment being right or wrong. Investment can go either ways good or bad. That is why it is important you do an extensive research to be sure that the upside over weigh the downside before investing. All investment cant always be right.
I myself have a way to be able to detect it actually by looking at the product of the altcoin project when it is running, how is the response from the cryptocurrency community and also see which exchanges are listed for altcoin so that indeed we can consider the trade volume for the future when I have bought the altcoin