Half of your questions was already answered a lot of times till now, you just need to look back a liitle bit.
Btw, why would masternodes sell their coins now, since project is performing good? Why would you kill golden goose?
Regarding transparency of gold.. As I know there will be third trust party, which will supervise quantity of gold each month and publish informations to public...
Golden goose???! Are you kidding? When all kripto is going fast up Xaurum holds its price, and you call it a golden goose? Just having a Bitcoin for last half of the year would make you x10, and having Xaurum makes you loose (from 0.31 last mint, to 0.22)... I don't know what goose you are looking at, but it isn't golden for sure!
And yes, masternode would run away when he finds out that the project has no future. He, with internal information, would save himself but all of us would be stuck with "no future" coin. One masternode has already left, the answer from QA is a lie to prevent panic, if you ask me. "Security reasons...", I'm not buying it for a second.