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
World currency desire for a new supranational reserve currency by showing off a coin minted with the words "unity in diversity". The coin, an example of a future world currency, emphasized his call for creating a mix of regional currencies as a way to address the global financial crisis. On 30 March 2009, at the Second South America-Arab League Summit in Qatar, Venezuelan President Hugo Chavez proposed the creation of a petro-currency. It would be backed by the huge oil reserves of the oil producing countries. An alternative definition of a world or global currency refers to a hypothetical single global currency