49:41Linda Xie and Avichal Garg explain the core ideas behind crypto, including blockchains, tokens, consensus, and smart contracts, then discuss where decentralized systems may be useful. They see payments and privacy as promising near-term applications, while many decentralized apps depend on solving scaling problems first. They also cover regulation, identity, governance, developer infrastructure, and the risks of token sales, arguing that founders should raise money thoughtfully and align incentives through vesting. The talk closes with privacy, government adoption, and ways people might begin using crypto without realizing it.