The motive could be extremely transparent. El Salvador doesn't have their own fiat currency because of some past revolution or some such thing. They all use USD. Now that USD is being printed out by the trillions they need to hedge against that.
Bitcoin is a new revolution of money. There's a huge financial incentive to be the first country to legalize it as a currency. Doesn't need to be much more motive than that: they're going to make a boatload of money. Of course there probably is more to it than that but there is already enough out there on the table to justify the move.
I've done a further deep dive into this topic https://peakd.com/elsalvador/@apshamilton/el-salvador-and-btc-deep-dive-on-momentous-impacts
Just read a comment from another post. https://leofinance.io/@apshamilton/re-cryptowendyo-qudet7
Something I was not aware of at all.
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yeah i was not aware they are exclusively using USD either.