Maybe, but given the time NobleCoin is live already, those investors bought or mined it as no other was doing so. So either they are in for a quick buck, or they have other ideas behind their investments. To me it is very simple, they bought the coins and kept the price to its level. If the price rises, they will release a certain amount of their coins to make sure that the coin is distributed. The more distributed a coin is, the more stable a price gets.
But that does not go for the whale type of investor btw. That is more the type of investor you are referring to. Unfortunately these guys won't show on the rich list as they need to respond as their bot needs to respond. Meaning that their coins most likely are stored on an exchange.