Well if i were you i would not put all of my money into only one coin. Ethereum will be good you are right but you can make much profit if you put your split your investments in couple of high potential coins.
That is allright.It is nit recommended to put all your money in eth. It will be safer to split it into several coins like ripple, litecoin, and others to limit your possible risk that may occur. This is a common strategy used by investors and we can follow it.