Depending who is the creator of bitcoin it could discourage investors to keep their money in bitcoin, because it's known Satoshi Nakamoto holds a considerable portion of coins, and if the person behind the nickname is found, there are some chances this person is connected to important corporations, businesses and institutions, what would centralize bitcoin around the elements the creator is involved with, in a kind of conflict of interest.
On the other hand, Satoshi Nakamoto might not be connected to any company or financial world's personalities, not impacting bitcoin negatively like said before, or he might be even dead at this point.