The problem with XPY is the market sqeeze, or that 99% of the currency in circulation is in the hands of a few individuals. This allows them to manipulate the market in any way they wish, and inflate the currency at a maximum of 350% with their private "prime nodes". It is no different than the federal reserve, with extreme centralized control - which is something I think it would be wise to not get involved in.

edit: I believe there is only a 100,000 XPY in circulation out of the 12,350,000 XPY.
Viz.