TZC is in a classical PUMP and dump stage it went from 0.2 cents to 0.7 cents and back down to 0.3 cents in matter of hours...
I have no idea where they buy and sell this as cryptopia aint working... and there is now way to sell my mined coins...
This is most likely temporary, I have seen this happen on many exchanges many times. A coin wallet gets shutdown for a little bit. I'm sure it will be back in the short term