Over the last decade, blockchains and crypto have opened up a new terrain for political action. It is not surprising, however, that the crypto space has also become overrun by unscrupulous marketing, theft and scams. The problem is real, but it isn't a new one. Capitalism has ruined crypto, but that shouldn't be the end of it. Blockchain Radicals shows us how this has happened, and how to fix crypto in a way that is understandable for those who have never owned a cryptocurrency as well as those who are building their own decentralised applications. Covering everything from how Bitcoin saved WikiLeaks to decentralised finance, worker cooperatives, the environmental impact of Bitcoin and NFTs, and the crypto commons, it shows how these new tools can be used to challenge capitalism and build a better world for all of us. While crypto is often thought of as being synonymous with unbridled capitalism, Blockchain Radicals shows instead how the technology can and has been used for more radical purposes, beyond individual profit and towards collective autonomy.