In my experience don't go with coin launched before 3 years or is not in the market for atleast 3 months.
Look for it's prospectus and community.
Ethereum was a best buy in 2016.
Find the next Ethereum.
We are same thinking sir, because in my opinion ethereum is one of the stronger altcoin in cryto currencies society. So I believe that in 2018 ethereum will be leads all altcoins in the market, due to good condition and reputation of this altcoin in digital current community.