I work similarly to you, going for safe consistent small gains.  I would advise you to trade on top 30 though, there are plenty of chances for massive gains. Look at ontology, or Verge. I was riding both those trains up and then jumped over to EOS and ICX which i'm on right now.

Anything in the top 30 is a fairly safe bet, and if you trade with "buy the rumor sell the news" you can end up pretty godamn green.
In the end of the day I don't really care one bit for 99% of the altcoins.  I just wana get more BTC.