Blockchain-based play-to-earn games have proved hugely popular in parts of Asia and Latin America
When video game designer Mark Venturelli was asked to speak at Brazil's biggest gaming festival, he submitted a generic-sounding title for his presentation -- "The Future of Game Design" -- but that was not the talk he gave.Instead, he launched into a 30-minute diatribe against the blockchain technology that underpins cryptocurrencies and the games it has spawned, mostly very basic smartphone apps that lure players with the promise of earning money.