Since you asked,

I will tell you my opinion, which has already been stated in my threads. I explained why I think at the time under the stressful circumstances they had, they would have gone for an easy, safe place to hide the treasure. A place they actually well knew, no more than perhaps 2 days from Tenochtitlan and a protected place to dig.
So, I find it unlikely they took it great distances, either the USA or another nation.
HOWEVER, I also stated my belief that other Aztec emperors had their own treasures, because originally there was a lot of easily found gold. That is just an opinion with no supporting evidence whatsoever.
And, they may all have done different things with their gold.
We must not forget that in Guatemala there may have been similar governments who also had gold treasures in their own times.
My SWAG (scientific wild, er, guess) is Guatemala had its own royal treasures in their own time, and the Tenochtitlan treasure which once belonged to Moctezuma II, if recovered as stated by Bernal Diaz, is located in my alleged hypothetical location. AND, there are other treasures from other entities in different locations in Mexico. And, in Central America.