All this ridiculous change in price is in fiat currency. If we look at its price in parity with BTC there is still 2% increase. In past it has resisted well and seemed powerful coin as hedge against volatility in market couple of months ago. This is also part of market to see decreases as well but someone is buying that's why sellers can sell.
Yes. Someone is really buying. If you look into the richlist of MNX holders, there are a handful of addresses that holds more than a thousand MNX now. The growing numbers of richlist and the price fluctuating is a sign that there is someone collecting/buying MNX in every dips.