And even if they do use BTC (they don't really, at least in Africa, i don't know about Venezuela), they do not trade using BTC but a second layer anyway.

This is either an uninformed or misleading take.

It isn't necessarily "Africa" or "Americas".

The heuristic is "is my local fiat shitcoin stealing my purchasing power".

Counter to your claim and easily provable with a basic search Nigeria is one of, if not the leading in BTC adoption %.

https://www.msn.com/en-us/money/news/nigeria-is-the-second-l...

https://www.statista.com/statistics/1194735/bitcoin-online-s...

Is it the shitcoin or is it the fact that the economy itself is gone and thus your currency isn't worth anything because nobody is selling things to you?

Here is an interesting article:

https://www.washingtonpost.com/world/the_americas/venezuelas...

BCH is trending to 0 in BTC. How does this solve Venezuelans or Lebanese store of value problem?

https://www.tradingview.com/symbols/BCHBTC/

Yet they just passed BTC's daily transaction volume (regularly) . Like it or not, BCH is about to eat BTC's lunch and good for them. They've earned it.

SoV first and only then medium of exchange. Not the other way around.

That is because BTC extremely unstable, which is good for speculation but not for a currency