It is a very old altcoin and you can simply conclude it is dead.

No trading volume but it has been on few small exchanges: https://coinmarketcap.com/currencies/colossusxt/markets/

The developers are active but it does not mean they are working productively. The last update in forum is for the swap to Ethereum blockchain: https://bitcointalk.org/index.php?topic=2141880.msg56024786#msg56024786

They said they are more active in Discord so you can join their Discord and ask more: https://bitcointalk.org/index.php?topic=2141880.msg56024818#msg56024818