I think these the price of ethereum is at their low levels so there is no harm to buy it. I think ethereum will break their levels in few months and you can earn more and more profit.
I think till the end of 2018 crypto market will touch the new heights because many countries are see the aspects of crypto currencies. and more over bitcoin will definite cross $20000 level. SO there will lot of opportunities in crypto market.
I will go for LITECOIN because is more potential that ripple and it has big investors and it,s credibility is excellent. LITECOIN is also getting better in the technology.
I think if you need money then you van sell your coins but if you have no requires then you can hold your coins long time and you will get extraordinary profit.
I think the whole market is running with the bitcoin position if the bit coin is down market is down and if it is up market is up so i think ethereum price depends on bitcoin 90% .