Can someone spot the flaw in this?

[ETC]

Hi guys, I've been looking at term deposits overseas and have found that in the Ukraine you can get 20% p/a. I thought this was too good to be true so I checked the inflation rate in the country and saw that it is currently -0.2%. If I use the fisher equation for the real rate of interest I get 20.2%. I also checked the exchange rate between the Ukrainian Hryvna and US Dollar and discovered that the currency has traded between a very tight range for the last four years.

Now my question is this... what am I not spotting that makes this a bad idea? Are there tax issues, fees, political problems, bankruptcy issues, continued problems with inflation? What are the cons?