why the Trust price is too low at the market (c-cex) ? miners sell them for loss ??

The block payout schedule has a nasty side effect of preventing the value of this coin from ever increasing. The only winners will be ones who had 3 million in the beginning when it was impossible to mine large quantities. That was the most profitable time to sell and will never happen again now that it has turned into a huge dumping game, guaranteed by the ridiculous reward system.
Sorry, but you are wrong, I took the first block for 3.5 Million to prevent dumping. Its Vaulted. Your a little short sided if you are just considering PoW Rewards. Sorry?