There’s no telling if the two events are connected, but their timing is mighty interesting.

The Polish government and the National Bank of Poland, in a “rare moment of unity,” agree to weaken Poland’s currency, the zloty, in an act that would benefit Poland’s exporters at the expense of Poland’s trading partners—that is, the European Union, among others. Then, the next day, Poland’s president and the president of its national bank die in a plane crash.
The real question is, will the currency changes stick, now the government heads that proposed it are dead !

Poland?s Leaders Move to Weaken Currency, Then Die in Plane Crash - BlackListed News