We saw El Salvador become the first country to accept Bitcoin as legal tender, and since then many countries have adopted Bitcoin.
No doubt many countries have legalized BTC and the use of cryptocurrency in their country, but it does not mean, it is equal to the level of El Salvador because El Salvador has made it their legal tender which totally differs from making it legal in your country. So, even if the new president is legalizing BTC then it does not mean it will become a legal tender in Argentina.
Well, if it becomes the adoption is just doubled from here, because it will gain a hell lot of traffic and this traffic will increase the demand over supply and the price will shoot up so even if big ETFs got rejected, the adoptions like Argentina and many other countries will help BTC to gain value. But of course, the amount that BR would insert in the BTC market might not be inserted by Argentina.
In short, it is a good thing as adoption is all we need.