Is digital money really the future? Cryptocurrency is in the spotlight after a record theft. At the same time, US president Donald Trump has announced a crypto reserve fund.
North Korea takes £1bn in crypto heist
Crypto warning: Experts believe the heist could be part of a broader strategy by North Korea to generate revenue from cybercrime. Glossary
North Korea - A country formed in 1945 when Japanese-occupied Korea was split between a Communist government in the north and a capitalist one in the south. Today it is extremely reclusive, and hostile to the West.
Cryptocurrency - A digital currency in which transactions are verified and records maintained by a decentralised system using cryptography, rather than by a centralised authority.
Dark Economy - Economic activities that are illegal or operate outside official government regulation and record-keeping.