There are many potential coins which are good for investment but I suggest you to invest in ETH, XRP, BTC, EOS.
This is a question that many persons ask each other on some coin forum. Sure, If we know which coin can invest to get profits, we will be rich. But not simple, in the current times, coin market is very not stable. So I think we should be patient.
You are some what right, with current price manipulation you never know which alt is going to be pump next but you have to take risk to earn good. Waiting at this moment I think is not a good option prices of the coins are going down continuously so it is the best opportunity to buy some.