Hello @saun, sorry for the delay, have missed that you have mentioned me in this reply.
The COCO token is listed on steem-engine as it was from the beginning, even though I have reserved the name on hive-engine too (which has cost 100 BEE like for every other token).
The listing on steem-engine means that the transaction data are stored on the steem blockchain but the meta-date and wallet balances are still stored on steem-engine blockchain which is an 'aggroed-product' like hive-engine. So from the security aspect there is no difference. If the steem blockchain (or hive blockchain) would not continue to work the balances are still known on steem-engine resp. hive-engine.
For now, for the association Simplex World Society it's easier to have COCO traded against STEEM[P] than against HIVE[P].
Thank you for your interest in COCO and @co2fund.
@retinox