Rather than getting upset about these guys I prefer to just observe and understand them as best I can. They exist and there's no point getting angry about it.
As far as I'm concerned their incentives entirely revolve around making their dollar balance go up. When this is your world it makes perfect sense to see Bitcoin as just another trade.
The irony is they see Bitcoin as NGU and respond by bringing more money into it causing NGU. It's self fullfilling. Then they sell it back to the speculators and the speculators sell it back to the long term holders.
In the end, the Bitcoin still lands in the hands of Bitcoiners.