I'm sure, almost any altcoin will make you rich in 2018, if you invest in a lot of money))) Some of the coins will get less profit while others will gain more, but I know for sure that the cryptocurrency will be a few more years in the bullish trend.
No, there is no accurate prediction if a certain coin can make you rich even if you invest a lot of money on it. The value of coins is increasing depending on the interest of people so you can only use positive speculations to boost your confidence on investing.