A frustration among gamers is that they can’t take their swords or characters from one game to another, and sometimes they can’t easily sell the weapons they win or buy. Blockchain gives players the chance to profit from their skills. Axie Infinity is played by more than 1 million daily active users—most of whom pay to play—who earn digital coins by defeating rivals and who breed cute monsters as nonfungible tokens, or NFTs, assets tracked via blockchain that they can sell on crypto exchanges. Some people in developing countries say such play-to-earn games have already become their main source of income. “This is a completely different engagement model that’s closer to work,” says Yat Sui, executive chairman of Animoca Brands, a Hong Kong maker of and investor in blockchain games.

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