Pix proposition is very valuable for governments, as it is the best way of controlling transactions, inside the country and cross-border.
To you second point, I think the pix penetration/popularity proves that the majority of the people trust the government for that. There are 2 key reasons for its success: It was mandatory for Banks to adhere to the system and there are no fees for using it.
Once multiple countries have their own PIX, they just need to build a federation structure to connect them and allow cross-border transactions.
Crypto-currencies have their place with people who don't trust the government, want to speculate and/or simply want to do tax evasion, but they are not and probably never will be mainstream as a transaction medium.
> Once multiple countries have their own PIX, they just need to build a federation structure to connect them and allow cross-border transactions.
To add to this, this is already happening. For example, you can already pay in the Middle East with India's UPI at quite a lot of places, or with China's Alipay or Unionpay.
Cash is arguably more secure and likely less traceable and easier to use if you don't trust governments. I don't see much use case for crypto other then illegal activities (although possibly not always immoral)
For federation, the hard part isn't building the system but building the required trust between the different states and getting it all set up legally somehow.
To you second point, I think the pix penetration/popularity proves that the majority of the people trust the government for that. There are 2 key reasons for its success: It was mandatory for Banks to adhere to the system and there are no fees for using it.
Once multiple countries have their own PIX, they just need to build a federation structure to connect them and allow cross-border transactions.
Crypto-currencies have their place with people who don't trust the government, want to speculate and/or simply want to do tax evasion, but they are not and probably never will be mainstream as a transaction medium.