Crypto Week: Time to regulate?

It's been another year of ups and downs for cryptocurrencies. In the second episode of our week-long series, we ask whether it's time to control how - and by who - they are used. This edition features an interview with Urban Anghern, the CEO of Switzerland's financial regulator. Elsewhere on the programme, we explore China's decision to reopen its borders in early 2023; and hear from a US-based ice-breaking business about the recent extreme weather. (Picture: A Bitcoin ATM next to a row of traditional bank ATMs in Istanbul, Turkey. Credit: Getty Images.)