Hey there
In june & July I bought Digibyte & Stratis & Siacoin with all my bitcoins, till now I lost almost 80%
What can I do, HOLD or Sell or What!
I think the best think you should hold. I know that there will be a better opportunity for you to sell your tokesn instead of selling right now when most of your investment has been lost already. It's either you wait for an opportunity when you can sell with minimal lost, have faith in your investments until the mooning, or you really lose that investment.