Having the "founder" anonymous and silent has been good for Bitcoin. Even if it didn't have any effect on the market (it would) everyone can fantasize and speculate about the motives for Bitcoin's creation, about the next moves, etc. So such founder is a superposition of anyone's idea. If that superposition collapses into one drug cartel boss, that would change many people's view about Bitcoin and it's purpose, legality and of course market price