Blockchains will revolutionize and disrupt many industries like finance, banking, real estate, and healthcare by enabling decentralization and transparency. Blockchain properties include immutable and transparent data visible to all participants, strong cryptography, peer-to-peer communications, and the ability to be public or private. Popular consensus algorithms like Proof of Work and Proof of Stake achieve consensus. Major blockchain uses include digital currency, payments, file storage, web protocols, tokenized assets, insurance, and healthcare.