My view:
HODL only strong coins: bitcoin, eth, stellar.
Trade between these coins and other altcoins to multiply your main coins.
I was trying to daytrade manually. But it takes to much time.

Recently I joined this guts as a beta tester; they are developing automatic trading robots. Got some profits this week, but markets are growing, so it wasn't too hard
https://bitcointalk.org/index.php?topic=3294989.0