I agree to the point that the company is probably done at this point, but of the off chance that it succeeds I'd get the 10% and then walk. if he raises another

I agree to the point that the company is probably done at this point, but of the off chance that it succeeds I'd get the 10% and then walk. if he raises another round etc. then that's a bargaining chip to get something (probably would amount to 0 but better to have it)