Of course we have to be careful, before you invest make a research about the coin don't be hundred percent confident because there's alot of scam coins out there.
Dont worry now it is very easy to save your investment and protect your money from scamming, dont buy any new coin which will have no credibility in the market, infect for me bitcoin is the best coin to help yourself avoid scamming and get good profit, dont trust any uncertain coin, so thats why I prefer bitcoin, it will give you safe and high profit for long term investment, dont be hurry to sell just have patience, make your own research too.