Last month, Bank of Japan Governor Haruhiko Kuroda wants a lower exchange rate to help foster inflation and could extend the stimulus program to achieve his goal.

Meanwhile, European Central Bank President Mario Draghi has stated that a weaker euro will be required to avoid deflation and help make exports more competitive. Many Eurozone economies rely on exports for growth, but deflation and a strong euro currency make Eurozone goods more expensive to foreign buyers. [Diverging Fed, ECB Policies Pressure Euro ETFs]

According to currency strategists, the Japanese yen will be the biggest loser among major currency by the end of 2015 and the euro is expected to be among the 10 largest losers as well. [Japanese Yen ETFs Face Major Headwinds]

More aggressive traders can bet on the currencies’ fall through the ProShares UltraShort Yen (NYSEArca: YCS), which tries to reflect the daily -2x or -200% daily return of the U.S. dollar price of the yen; the ProShares Short Euro (NYSEArca: EUFX) tracks the inverse, or -100%, daily performance of the U.S. dollar price of the euro; and the ProShares UltraShort Euro (NYSEArca: EUO) and Market Vectors Double Short Euro ETN (NYSEArca: DRR) both provide double inverse, or -200%, the daily performance of the USD price of the euro.

For more information on the greenback, visit our U.S. dollar category.

Max Chen contributed to this article.