No I don't think he is wanting to dump. He may not know what he is doing exactly but I think he really wants to help the Rhinos. Why would he mine only 0.1%? He has been giving away 50'ish coins to people who ask.
Trust me on that. But your choice if you go forward, i respect that. He obviously have no skill to maintain the coin, so he'll dump what he have, then disappear like some others. Using a legit cause for a fraud, "piss me off".