COSS as a token is dead to me. It can't really go much lower than this. But the way it's designed, there will never be a high 24h volume on the token.
I have two tokens that are comparable to each other at their current price, COSS and SunContract. But, COSS was at $3 ATH and SunContract at $0.6. COSS price has tumbled down more than all coins that have some value and are not considered to be a scam (although people seem divided on this part, but officially it's not a scam).

COSS as an exchange feels abandoned. It has a crawling development, no ambition and I'm slowly losing hope that more will come out of this.
The altcoin bubble burst a while ago and with that COSS team ambition to make steady improvements.

People can come up with excuses that it's bear period etc. But no token/coin with good worth has lost as much value as COSS token has.
Is it a buying opportunity now that COSS has lost almost 97% of its value? I don't know. I'm not a trader, nor I have any inside info on the project.