Imo too much attention is directed at the United States of America, it's not an American pandemic, it's a global one and every country and currency is experiencing the downturn effects of this pandemic, even the Euro and Yuan you suppose is going to take over the USD's place as the reserve currency of the world is still below the USD and are also going to take steps back after this pandemic the same way the USD will, so there's no chance they are taking over now.
Do you think that US military power will remain as strong as it is now with 30% unemployment rate that will stay like that for months? Who will pay for this? Printing has it's limits.
The United States basks in the strength of their defense force and this area is one that wouldn't be weakened even with all this economic crisis and unemployment going on. The United States is under the constant watch of alot of foes, so no matter the cost they cannot let their guard down in military strength/power.