Actually I think you made a nice selections by adding bitcoin and ethereum so that should in case anything happens you won't lose the both side, at least you can recover from one side that is why is not always advisable not to keep our ege in one basket, because you don't know what will happen to the other basket. However ethereum has proven to be the best among other altcoins that is why ethereum keep  gaining more popularity in the market. of course ethereum is a good asset that can profit One  in the future, the reason why I chose ethereum over other altcoins is because is good for Long term holding.