I am pretty sure that ETH’s (and other currencies’) push into developing economies is a way of courting those countries into becoming native users for domestic transactions. This can be win win if the payment network improves the ease of business transactions over existing infrastructures for everyday people

This also takes away power from governments and oligarchs who sometimes abuse the compounding or the ability to print the currency. The idea is: Whenever any one party hoards too much wealth in bad faith, negate it by devaluing the currency that wealth is measured in. Do this by refusing to transact in that currency. Digital currencies allow for this :)

TBH though crypto payments is still too high minded for the average person under a despotic regime to access. When much of the world is missing access to running water, needing internet and smartphones AND swimming through the sea of web3 jargon is a lot to ask for. Transacting in cash in a more stable foreign currency (or gold) just makes more sense