This is good news ! I know who will hate it; Western Union. They'll lose a fortune in the exorbitant fees they charge.

A good way to see who could be next is to look at countries with the highest % of GDP in remittances from ex-pat workers.

https://www.theglobaleconomy.com/rankings/remittances_percent_gdp/ is a good starting point. Tajikstan, Lesotho, Bermuda and Gambia are good candidates. Somalia and Haiti would be great opportunities, but I'm ignoring them because their governments are barely functional (although the citizens might just do it anyway). Kyrgyzstan and Nepal are virtually Chinese satellites so unlikely to do it, and many of the others are too closely aligned to the US and unlikely to do it. The Philippines could be a possibility if the next president is as independent-minded as Duarte (although I appreciate he's a divisive figure, he appears to have wanted to chart a foreign policy less tied to US requirements).