I think what you're going to find out is letting go will actually be a huge relief. You're going to bumble around feeling like a worthless piece of shit for a few weeks and then ideas will start boiling over in your mind. Before you know it you'll be writing a business plan or prototyping something new and you'll be armed with this failure as a roadmap of what not to do. You sir will be a-ok.

PS. Not having any money at least once in your life is something everyone should go through. You'll be surprised at how well you eat and live when you thought you'd be homeless. You'll also realize how much bullshit you have in your house or services you pay for that you really don't need. Good luck - you won't need it.