Just look what happened to Bitconnect.
I guess next is Usi-Tech, followed by Tether.
You really should do your research before sending money anywhere.
Difficulty is jumping up crazy, maybe I was a bit too optimistic with only 18% difficulty increase every 10 days.
When BTC prices and difficulty keep moving at these rates, I am looking forward to see how many people will keep mining at a loss.
Current daily revenue for 1 TH is USD 1,44 minus USD 0,32 electricity @1 cent / kwh.