What do we do now
DASH is not a one trick pony coin so zcash is not our competition. your concerns would be better suited for that other one trick pony coin whose price is in free fall.
concern troll:
A person who posts on a blog thread, in the guise of "concern," to disrupt dialogue or undermine morale by pointing out that posters and/or the site may be getting themselves in trouble, usually with an authority or power. They point out problems that don't really exist. The intent is to derail, stifle, control, the dialogue. It is viewed as insincere and condescending.
A concern troll is a person who participates in a debate posing as an actual or potential ally who simply has some concerns they need answered before they will ally themselves with a cause. In reality they are a critic.