It makes sense for an investor to keep quiet about the coin because if it does not completely sell out, the unsold coins will go to mining and so higher returns for investor.
I don't think it makes sense to do that. The more momentum we can give it now the better in the long term. I think it is in everyone's interests to make sure that the PRESALE is sold out as quickly as possible. Imagine the PR that will bring - it more than likely will get SYScoin into the mainstream press and consciousness.
Most investors pump and dump any ways, so that is the logic that many are following. Less market cap at launch, more room for growth. Does it make sense? Who knows. That's their point of view.