Digital currency of its creators. "Forbes" writer Tim Worstall has written that the value of bitcoin is largely derived from speculative trading. Bitcoin has also been criticised for its energy inefficient SHA-256-based proof of work. Digital currency Digital currency (digital money, electronic money or electronic currency) is a type of currency available in digital form (in contrast to physical, such as banknotes and coins). It exhibits properties similar to physical currencies, but can allow for instantaneous transactions and borderless transfer-of-ownership. Examples include virtual currencies and cryptocurrencies and central bank issued money accounted for in a computer database (including digital base money). Like
Reserve currency Russia and the People's Republic of China, central banks, and economic analysts and groups, such as the Gulf Cooperation Council, have expressed a desire to see an independent new currency replace the dollar as the reserve currency. On 10 July 2009, Russian President Medvedev proposed a new 'world currency' at the G8 meeting in London as an alternative reserve currency to replace the dollar. China, Russia, India, Turkey, Brazil, Venezuela and other oil-producing countries have recently agreed "to transact all of their mutual trade and investment in their own currencies" effectively minimizing the need, at least in the short term,