[ljosifov]

Done that. As a store of value - USD has lower volatility than BTC => USD wins as a store of value. As a medium of exchange - USD paper notes are more convenient to work with (on balance) => USD wins as a medium of exchange. Hence - people in 3rd world countries are not silly or un-informed to prefer another country fiat currency (from a - comparatively - well enough run country), over theirs' (badly run) country fiat.

[RestlessMind]

> As a store of value - USD has lower volatility than BTC => USD wins as a store of value.

Depending on your place of residence, USD may have a high tail risk if your country decides to cross USG's plans. For those places, better to have a non-USD non-EUR alternative. Only Gold and BTC come to my mind.

[ljosifov]

Even when the country gov is hostile to USG, the citizens will still use USD. Citizens use cash, USD notes - not USD bank accounts. No bank accounts are involved. The relations between USG and the local gov bears no consequence to the use of cash. I saw through civil wars in the 1990s, and did not see a single use of gold for anything. The next big state fiat was used for everything. Sorry for the downer.