Cedivad - I'm curious. If all you want are your BTCs back, why did you ever buy mining equipment in the 1st place? Wouldn't it have been easier and less stressful to have just kept your BTC?

As for suing HF, please remember that you are dealing with a start up. So unless they get a lot bigger/more successful, i am not sure what you will achieve by suing them, as it will simply be like stabbing a straw man. All that will happen is that you will make things harder for the co and perhaps force them into liquidation and in this case, there will likely be even less support for their equipment than if they are still around. The same applies to other startups too BTW as there are usually few (if any) assets to go after with a start up. You might therefore want to save your money rather than throw good money after bad, if that is what turns out to be the case. Buy more BTCs if you believe they will go up from here, but don't waste your money on lawyers when it is likely there will be nothing to go after