What is de-dollarization? Here's everything you need to know about rival countries' efforts to dethrone the greenback

• The US dollar has dominated global trade and been the leading reserve currency for nearly 80 years.
• But rival countries – including China and Russia – are trying to change that.
• Here's everything you need to know about the anti-dollar movement, and whether the buck is at risk.

For nearly 80 years, the US dollar has dominated international reserves and served as the main currency used in global trade.

But a growing list of countries – including Brazil, China, and Russia – are trying to unseat the greenback.