This is important for firms selling to customers in countries known for credit-card fraud, such as Russia or Belarus.But another big reason for the currency's success is its role in dodgy online markets.
The main reason for the currency's rise, analysts said, is that central banks in the United States, Britain and Switzerland are taking radical steps to increase the amount of dollars, francs and pounds in circulation to try to revive lending.
The potential of bitcoin in China is seen as a large part of the reason for the currency's seven-fold increase in price over November, and the news that the Chinese central bank is taking a less-than-welcoming stance to it has sent markets tumbling.
Most point to the threat of a new wave of sanctions being imposed on Iran by US President Donald Trump as the main reason for the currency woes.
And the reason for its currency may have been as follows.
A reason for hedging currencies is to make a foreign stock portfolio a little less volatile for U.S. dollar investors.
And it has just got its unemployment forecast completely wrong.Meanwhile, there are old-fashioned reasons for the currency markets to worry about the pound.
It actually cited two reasons for the currency's weakness, saying between August 2015 and February 2016 "the British pound depreciated by 7%, driven by expectations of a later normalisation of monetary policy in the United Kingdom and concerns about a potential exit from the European Union".
John Cochrane presents one possible reason for the Russian currency decline citing research from a sequence of papers on currency crises by Craig Burnside, Marty Eichenbaum and Sergio Rebelo influenced by the Asian Currency crisis, including "Prospecitve Deficits and the Asian Currency Crisis".
While the economic reasons for national currencies may be fading, the political ones have not.
