Actually I don't believe its masternode holders dumping their coins, masternodes earn around 1.6 XLR daily and with 718 masternodes online that is 1148 XLR being created daily from masternodes. So lets do some maths, we take 1148 x the current price $6.61 = $7,588 which is nothing compared to the amount of volume daily which is around $65k to $70k. Also not everyone would be selling as I'm not selling any of my rewards and I know many people with several masternodes and they ain't selling either so I don't think its masternode holders selling. I think that a few are manipulating the price as there isn't many coins in circulation and can be easily manipulated with just a small supply. Just a rough calculation shows that there is around 500k XLR circulating.
Agree with you, vella. If I remember exactly, total number of Solaris masternodes grew significantly when Solaris price stood at somewhere around $15- $20. I don't see any reason for those Solaris masternode investors to sell their coins (including both original coins in masternodes and rewards from them) at the current very low price of Solaris.
In addition, as everyone can see, the Solaris project has grown gradually, more good things to come. It is another reason why I don't think those guys has sold and will sell their coins at low price.