Many people are investing in crypto currencies.

Many countries around the world use fiat currencies as their official form of money.

I exchanged my dollars for various foreign currencies.

The US dollar and the euro are both reserve currencies.

The euro and the dollar are common currencies used in many countries.

Green currencies are becoming more popular as people become more environmentally conscious.

Many countries prefer to hold hard currencies as reserves.

The central bank holds baskets of currencies to diversify its foreign exchange reserves.

The International Monetary Fund uses a basket of currencies to determine the value of its Special Drawing Rights.

Many people are investing in virtual currencies.