Difficulty need to be half from today, so I can mine 50% more to get any profit with 70 sathosi per day.
If your break even price for mining is greater than the cost to buy them on the exchange - then you are being irrational mining them and should instead buy up surplus supply from the exchanges.
1. I can stop mining? And wait until price arise? Or I can stop selling, but continue to mining. Since difficulty is dropping, I will got higher amount of DTC in same time,
2. Why to buy coin that doesnot promise at all? It is like you throw money in the wind