From
NOVAEXCHAGE:

2018-12-06 17:32 - De-Listing Notice for 7 January
Life cannot be all about new listings and fun. A responsible Crypto Exchange need to keep a tight ship.
Today we announce a few coins for de-listing. This will be a 32-day notice so that it will end on monday 7 January.
Coins to be de-listed in 32 days:
BCO
CNO
What a shame. I did not get notification (such as thru my emails) for my NOVA account. I have not been able to trade (due to trading restrictions from USA) and pay attention to such an unexpected notice (in News) @NOVA while busy setting up the coming
BalloonaFide (Free) launch.
It is not my fault. Novaexchange does not allow Accounts trading from USA (although it is opening for trading from Canada).
Nevertheless, it constitutes quite inappropriate notification in delisting Coino Coin (CNO).
I will request NOVA to keep CNO there. There are some reasons and you might know them soon.