What is the Polish currency?
Polish złoty
This disrupted the whole economy of Poland, and galloping inflation began. The ​1⁄2 marek and 5,000 marek banknotes became worthless in two years. As hyperinflation progressed, Poland came to print 1, 5 and 10 million mark banknotes. However, they were quickly almost valueless. 10 million marks cost only US$1.073 in January 1924. Immediate action was needed. Władysław Grabski was invited to stop the pending hyperinflation. As a result, the second Polish złoty was created.