Being down to 0 money left is quite different to bankruptcy, do you have large debts that are going to cause someone to file bankruptcy proceedings against you? Otherwise I would have thought worst case scenario was really just looking for a new job and you might know that you need to do that slightly before you fully run out of money.Lets imagine the lead time for getting any old job, starting and getting your first pay cheque is 6 weeks. So 6 weeks from running out of money I would start job hunting.

From your comments in reply to others I assume you are young(ish) with no dependents. That has to be the best situation to start a business in. You talk about perhaps doing this again in the future with another idea, but imagine in that future you are married, you have kids, you have a mortgage. I'm in that position and I can tell you it is a lot lot harder than it is when you have no body depending on you - I can go without for a while, but kids grow, they need new clothes etc. You also get more accustomed to a lifestyle as you get older - which is hard to give up (Thank God I built up a cellar over the last few years because I cannot afford to buy wine now!).

If you've lost faith in your idea or don't see it being a success then cut your losses now, but if you still think you can make it work my advice would be to go for it.

Good luck.

PS. Also you mention that you are doing everything from dev to sales and marketing. If you actually have contacts in the industry I would focus 100% on dev, then get them to look at the product properly. People you know don't need to see your sales and marketing to tell you if the product will be a success.