That's not entirely true. The US dollar is backed up by it being mandated as (I believe the only) acceptable payment for US taxes. So long as the US government exists, US currency will have value to anyone who has to pay those taxes.
That's not entirely true. The US dollar is backed up by it being mandated as (I believe the only) acceptable payment for US taxes. So long as the US government exists, US currency will have value to anyone who has to pay those taxes.