The site is up, it's just non-responsive... It doesn't allow you to log in.  I'm hoping it was an attack and they are trying to recover. Otherwise if it is an inside job, legal action is pending.

Just got a human response to a YBC ticket:

    On Sun, 22 Mar at 12:03 AM , [REDACTED] (me) wrote:
   
YBC has stated that you don't intend to honor balances purchased after November 2014.  I'd like to know if this is true and If I will ever be able to withdraw my YBC... If not, what will Cryptsy do to compensate customers who were misled into thinking that the YBC they bought were legitimate?  I'm guessing I'll get the same canned response, that my "coins are safe" but I hope not.

Response:

Hello [REDACTED],

YBCoin wallet is still offline while we are doing a swap to a new chain. There is no estimated time given by our technical team but rest assured they are working on it and we will inform all once it has been restored, so you can make your withdrawals.

Your patience is greatly appreciated. Thank you.

I don't know if this is legit, but it at least offers some hope.