Sorry to hear about this especially having seen first hand the efforts that went into this airline.
The business model is flawed however and that is evident by the demise of the previous comers.
Trying to sell an all business class airline and provide seats at a lower cost than the competition is burning the candle at both ends and if you are using other people's money to do it, then there will come a time when the paper brochure does not reflect the promised profits.
Silverjet appeared to be the best of the bunch with amazing staff who really went the extra mile to make the experience great. However, like all businesses involving investors, if there is no sign of money coming out after the stuff going in, then the investors shut off the valves and move on.
In my opinion, the "business class only" airline would be twenty or thirty years old at this point should the legacy airlines have thought it was a viable model - clearly it isn't.
Back to the drawing board.