From my personal experience,it isn't worth it but check for bitcointalk forum/slack for that coin.If dev is active and working on new features than invest without hesitation.take html5 and cv2 for an example.they remained at 1 sat for about 2,3 months but than got pumped to 5,6 sats.that means atleast 500% profit.
RE: How to earn profit on shit coins.