Should I give up?
swombat: This is probably easier to do with someone in person... I'd find another entrepreneur that you respect and trust and get a second opinion on what you can do. You may find that there's actually a whole range of things you can do (and you'll hopefully get some pretty direct, no-bullshit evaluation of whether your business makes sense). Be open with that person, so that you get equally candid advice.As a piece of generic advice: I think it is never, ever, ever a good idea to get in the situation where you will go bankrupt if your business fails. Be relentlessly resourceful, but also be relentless at managing your risks to ensure you don't lose everything if things don't work out. When it all comes crashing down, you need to be still able to pick yourself up and move on to the next thing (perhaps even another start-up).