Nothing divides opinion in the world of finance as much as cryptocurrency. Supporters say it's a sophisticated, secure digital asset - free from government control - critics call it the mother of all bubbles, used by criminals and bad for the environment. In recent weeks, cryptocurrencies such as Bitcoin and Ethereum have soared fuelling debate about the volatile world of virtual currencies. In Talking Business Weekly, we explore the theme with Dr Gavin Wood, the co-founder of Ethereum - the world's second most valuable cryptocurrency behind Bitcoin - and India's former central bank chief Dr Raghuram Rajan, and ask why businesses from Wall Street banks to credit card giants and car makers, and global central banks are all getting on get on board. Plus, we hear from the boss of Mattel, the firm behind Barbie, about how the pandemic changed the way kids play with toys.