ark and eth are important in responding to this question, as the goal and system of these coins must have a solid structure and their research is finally invested

the right time to invest in Electroneum (ETN). now value is $ 0.097, I'm sure the end of 2018 will be worth $ 1 or more

In additional if we invest a huge amount and percent of return is very low after then there will no problem because something you will received in return and something s better than nothing. Maybe for high return there must me high capital required to invest and in return we will get high return if we invest in ethereum it's true that it is growing and it has a high value but it drops down then what will happened to your capital. For me best altcoin still ethereum

How does he make his predictions?  It's wishful thinking just like almost every recommendation on this website.  Or by pulling numbers out of your ass.  Take your pick.

Look at Restart Energy

The best altcoins to me will be ICOs that will emerge with tangible projects in 2018.
Following some trends, the thing that will change is more and more non-ethereum ICOs will come out. For example, Arcblock.
Arcblock is a project that will have an integrated blockchain solution and a solid team with experienced devs.

PRL is at sweet spot right now, is $1 and 2 weeks ago was $4 so theres a chance to pull at least a 2X, oxycoin is also a good bet, deeponion the same, there's lots of opportunities out there with this FUD.

Everything is nicely dipped at the moment so a really good time to pick up higher potential coins. I'd look at privacy (PIVX, DeepOnion, NAV) and the ecosystem coins - VeChain, ICX, Neo, Gas, Apex.

I would say that a good one to invest is @Viberate . Currently at 0.00033 ETH per VIB what is the value of ICO. Some good updates and changes are announced from them for february but so far they don't want to give some spoils on it. Highest value I noticed was 0.00066 ETH per VIB