Dash would be great for big Position trading , because it is well supported. I mainly make my big trades on ETH and BTC, and then small trades on all other coins with good charts. So far, I just have been treating Dash like all the other Alts, and not concidering taking bigger trades on it.. But there really is no reason not to use Dash for some larger trades..
Anyway, there is no reason in particular that I havnt been trading Dash, I just kept busy with all the other coins...