Is this at the seed stage or later? Wouldn't VCs prefer to put their money in one who has tried a startup before and failed than a first-timer for whom there are a lot more unknowns?
Oh, and if your investors fire you "for performance" (if the thing in a tail spin, getting fired almost doesn't matter and might make your life better) you might as well kill self. No one is going to touch a fired founder with a 10-foot pole. Even regular jobs are out of the question, much less the EIR sinecures and executive injections that acqui-failed founders usually get.