A bank called Khan Bank in Mongolia is offering to keep my savings at 15.10% interest rate, account denominated in Mongolian Tughriks. They give an example "if you saved 100.000 MNT on 2013/11/12 you would be getting interest amount equal to (100.000*15.1%)/365 everyday till 2014/03/07."
This interest rate sounds unreasonably high. What is the catch?