Why would countries invest enormous amounts of wealth in something that the USA print out of thin air at an alarming rate (total number of dollars double every

Why would countries invest enormous amounts of wealth in something that the USA print out of thin air at an alarming rate (total number of dollars double every decade, halving the dollar's value) when a digital money exists with global final clearance within an hour and a capped supply which is only around 1% higher than the current supply level? Network effect of the dollar can't defend against this kind of inequity.