no doutbt that Ethereum is a good alt, you should invest here and it will really give you good profit, although its price is stable for last few days and i think that the reason is that people are holding bitcoin and not going to invest it any where as they are expecting that the price of bitcoin is going to increase in next few months.
Yeah ether still good to choose altcoin since its a 2nd from the top cryptocurrency from coinmarketcap
But it is not good to buy right now because the price of ether right now is high .. and i think it is better to wait more days or weeks if the price will goes down..