Yacoin needs an active developer community and marketing team. Where everybody does a little job of promoting/improving the coin 
Like I did for example with my signature.
I created a thread on a big forum (HackForums)Like I did for example with my signature.
If you're interested in reading it, here's the link: http://www.hackforums.net/showthread.php?tid=3505553
Only registered users can read threads though.
We will all end up beeing hacked, thanks!