Brazil's government-run payments system has become dominant

Pix revolutionised the way we transact in Brazil. I've used Pix to pay for things that cost only cents, and I have a friend who bought her house using Pix. The system just works for any transfer amount. And it's so easy to use.

Its speed is truly baffling, and so is its reliability. Never have I failed to make a Pix payment because of downtime. I never cease to be amazed by how fast money arrives in my Brazilian account when I make a withdrawal directly from my EUR wallet on Wise. I receive a push notification from my Brazilian bank before Wise finishes running the animation of confirmation of withdrawal. It's like magic.

And it's so widespread that nowadays I don't even question whether someone accepts Pix. When I get in a taxi, no matter how old the driver is, it's certain that they take (and prefer) Pix.

I've even had homeless people ask me for Pix instead of change on multiple occasions.

Cryptocurrencies don't stand a chance.

Now, try to use Pix outside of Brazil - it's not even used in other Mercosur countries, what's the chance of having that adopted in other countries... And, that's problem #1.

How much do you trust your government with your money? A system like Pix don't stand a chance to get a worldwide adoption - maybe people are naive but governments won't unify to adopt a common system controlled by just a single entity / country.

What we may however end up with, are dozens of systems like Pix, one for each country, union, etc. Still cryptocurrencies as-is remain relevant (see point 1)

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.