Then you re exaggerating it. Yuo can't even do that between EU countries, which are literally a single market. Imagine spending your next mediterranean vacation with just your Swish app, you 'd probably starve. The thing is, whatever good infrastructure sweden has built, it will take a looong time for similar tech to be adopted throughout much of the world (and i m pretty certain it will meet a mountain of resistance from rent-seeking banks). Instead, cryptos only require that the other party can download a wallet app, which is arguably easier.
But when I'm on vacation then my Mastercard in combination with cash works without hassle. There is just one big win with crypto and that would be if I want to send money to someone over distance reasonably anonymously. That is where I can see a real gain over my current setup offers.