no doubt that Etherium has good potential to increase, it can really give you good profit in long term but i think in present time the investment in bitcoin will be more profitable as compare to Etherium. because the price of bitcoin is continuously increasing and it s expected that very soon it is going to cross 3000 USD very soon.
Do not believe into Ethereum too much. There are blockchain based projects has already started and now into testing phase which are similar to provide the smart contract facilities but based on blockchain technologies. Those dapps now could be developed based on blockchain itself.
Altcoin trading is okay to have for short term benefits, I never suggest them for long term nor for regular consistent income generations. Ethereum may get fade away how litecoin has faced some times back.