The Bitcoin virtual currency lost half its value on Wednesday because of a panic sell-off.

BBC: Minted bitcoins

The country's currency lost 37% of its value last year.

ECONOMIST: Politics this week | The

In a sign of India's precarious position, its currency has lost more than 15% of its value against the dollar since August, making it the worst-performing currency in Asia.

WSJ: As Growth Stutters, India Woos Foreign Investment

And the value of the Iranian currency, the rial, has lost at least half of its value against the U.S. dollar from a year ago.

WSJ: Iran's Leader Keeps Up Bluster Against Israel

Recently, Malawi's currency, the kwacha, lost almost half its value and this has put a strain on the running of businesses.

BBC: A Malawian fashion designer's colourful dreams

The currency, the guarani, has lost 26% of its value since January 1st.

ECONOMIST: Angry protesters take to the streets

The currency, the rupiah, which has lost 80% of its value against the dollar since last July, still looks vulnerable.

ECONOMIST: The hopes for recovery fade

Iran's currency, the rial, is also believed to have lost 80% of its value against the dollar since the start of the year.

BBC: Iran sanctions disrupt medicine supplies

Iran's currency, the Rial, is also believed to have lost 80% of its value against the dollar since the beginning of 2012, making imports prohibitively expensive.

BBC: Magazine

One problem is that the block's two largest members have such different currency regimes: Brazil's floating (or sinking) real has lost over 40% of its value since its forced devaluation in 1999, whereas Argentina's peso is pegged to the dollar.

ECONOMIST: Another blow to Mercosur