I agree with that. For example linking the U.S. banking system via ACH/Fedglobal with the El Salvador one as Panama and Mexico have done to bring down transactions costs.
https://www.frbservices.org/financial-services/ach/fedglobal
> This is just not true. Crypto as foreign remittance has been proven and is working quite well in Argentina.
But El Salvador is not Argentina though. El Salvador had never been affected by unstable currencies or unfavorable exchange rates set by their governments.
Bitcoin on the other hand, has been the first experience for Salvadorans, of having a currency that loses 50% of its value.
I'm just judging from their accents in Youtube videos, but part of the Salvadoran bitcoin wallet developers were from South American countries, so it seems to me that they were trying to solve a problem that existed in their countries, but not in El Salvador.