Which altcoin is going to be the best option this year ? Will it be ethreum again or the results will be different this year? Which will be the most profitable altcoin with very little chances of slump ?
Since you discuss about price, this would be more suitable to stay in Speculation.
Then, it's hard to say which altcoin will perform the best, since quite a good number of them started to deliver, so as soon as the money will start flowing back into crypto market, many of them will grow nicely.
Even some of the more established altcoins (since you mentioned ETH), which usually are safer bets, did fall in price while still showing development, so they'll also have plenty of room to grow.
In the ETH area there's quite a competition between smart contract and ICO platforms, ETH is still in lead, but "newcomers" are coming pretty strong.
The only problem remaining is.. when will the money start flowing again into the crypto market
I guess that we need more patience.