It makes things sound easy, but it isn't that easy. What is a "good" coin? Who is telling you that you hold a good coin given all those others out there?
That's the tricky part. The better way to look at it may be to not be holding a "bad" coin vs just assuming whatever you have is "good". Bad coins are easier to define -- coins with nothing special, no real tech specs that matter, little in the way of development and either no -- or a ridiculous -- plan for real world usage.
Taxi coin and Dentacoin come to mind as "bad" coins -- or pretty much a zillion junk coins with no development and no sensible use to them. Not that they too can't go up and be profitable, just that the odds are against it long-term.
Yes, I remember BBQCoin getting pumped, dumped, then high volume pumped again. That was a total junk coin with no real use, apart from maybe paying for barbecues.
If that can get pumped anything can.
Such announcements should be more often 
Devs obviously really need to post here more often!!! 