Being an international currency is required to have a lot of money because it will be used worldwide. Then on the next point should also be able to maintain the world's trust in the money. By weighing this requirement, surely the owner of international currency must be a strong country. Not only strong economic but also strongly political security of the country.
This can be exemplified as for example the state-owned Iraqi dinar currency. Although the currency is quite strong, but the state is unstable because of the war. This causes the dinar to be used as an international currency, the countries that own and store the dinar will feel anxiety if the country is destroyed. And once the country is automatically destroyed the country will be poor and its currency will fall down. Anyone who keeps the foreign currency, especially in the long run will definitely think about this. They do not want to lose. Hence chosen US Dollar which became the international currency because the United States is predicted to be stable in the long term.
Judging from the current Yuan that has decreased the value of the currency then it is not possible that the benchmark is yuan