One is that you truly have a great idea that can help many people, have carried it hundreds of miles on your back, over a thousand obstacles. The only trouble is that you haven’t been able to sell it yet.
Another is that you’re already dead, your idea as dead as you are, your failure to convincingly sell the idea to anyone a clear indication of those deaths. Everybody knows of your death but you, that’s the reason for the forced smiles when you make a joke.
There are other possibilities, of course, many of them, but those are two.