MinexCoin (MNX) is the fuel coin of the MinexCoin payment platform. At the time of writing, you’ll be able to trade MNX against USD on the Exmo exchange and trade it against other cryptos of a few other exchange platforms. MNX can be mined.
NavCoin (NAV) anonymous cryptocurrency operates on its own blockchain and serves as the coin of the NavCoin digital payment platform launched in 2014. It is currently represented on a few exchanges.
Comet (CMT) cryptocurrency is formally accounted on the number of ratings.. However, there is no up-to-date official information about its current status. Therefore, we can conclude that the coin is currently inactive.