Searching for a good coin is no easy task, but I believe hard work pays off.
This is the key for searching that good coin,
Know the purpose of the coin
Target Market
Team, this is very important because lately they've been many cases of ICO scams
The most important things are devs, whitepaper, road map and community. If any of this things isn't good then you shouldn't invest much money in that coin. That's the way i see it.
Bitcoin and Ethereum are better choices in this current market because I will say about the Bitcoin which has low value these days. However the value increased a little but still it is achievable and affordable for us which will be in our benefit if we do so. In this way we will be able to have large quantity of coins if we use small amount as compared to the average price of Bitcoin where we use more amount to buy coins.