Cryptocurrencies are on the rebound, but does the case for investing in them make any more sense?

Manuela Saragosa hears both sides of the argument. Jay Smith is a long-time player in the markets for these digital tokens, and is a popular player on the electronic trading site eToro. He explains why he believes Bitcoin and its ilk have a long-term future, even though he doesn't personally subscribe to the libertarian ideology that most of his fellow investors share.

However, cold water is poured on this vision by sceptic David Gerard, author of a book called Attack of the 50ft Blockchain. Plus Angela Walch, a research fellow at the Centre for Blockchain Technologies at University College London, says she thinks the crypto craze is a symptom of the broader rise of populism since the 2008 financial crash.

(Picture: A visual representation of the digital Cryptocurrency, Bitcoin; Credit: Chesnot/Getty Images)

The British prime minister looks for a new deal to solve the deadlock over Brexit. Ed Butler hears from Jill Rutter, Brexit programme director at the Institute for Government in the UK, and Tom McTague, chief UK correspondent for the website Politico. Yanis Varoufakis, the Greek former finance minister who negotiated with the EU over Greece's bailout deal, tells us where Theresa May went wrong.

(Photo: Theresa May delivers her latest speech, Credit: Getty Images)

The rise and fall of Indian jeweller Nirav Modi, arrested in London and accused by Indian authorities of a massive fraud. Ed Butler speaks to Mick Brown, a journalist at the UK's Daily Telegraph who has covered the story, and James Crabtree, author of the book The Billionaire Raj.

(Photo: Nirav Modi at his office in Mumbai in 2016, Credit: Getty Images)

Voice assistant apps like Alexa, Siri and Google Assistant are about to transform the economics of the web.

Nearly a quarter of all households in the US and in China already have a smart speaker in their homes, allowing them to play music, order a delivery or find out the news, all by simply talking to their computer. Meanwhile an estimated 2.5bn smartphones now carry these wannabe AI oracles.

Manuela Saragosa asks Silicon Valley analyst Carolina Milanesi whether this new technology could one day rival the conversational prowess of the ship's computer on Star Trek. And what kind of vision do the likes of Google, Apple and Amazon have for it?

Meanwhile journalist and author James Vlahos explains why he thinks their advent is bad news for anyone who wants to maintain any visibility on the internet. And we put his criticisms to one of the major players - Andrew Shuman from the team behind Microsoft's Cortana voice assistant.

Producer: Laurence Knight

(Picture: Amazon Echo Sub subwoofer; Credit: Philip Barker/Future Publishing via Getty Images)

Rome's decision to sign up to China's One Belt One Road initiative has proved controversial both at home and among Italy's closest allies.

Washington DC and Brussels are both sceptical of the true intent behind Beijing's programme for financing major overseas infrastructure projects, ostensibly to enhance China's trade routes. President Xi Jinping's recent invitation to Rome to sign a memorandum of understanding with the Italian government - an initiative spearheaded by the little known Italian economy minister Michele Geraci - has caused consternation.

Manuela Saragosa gets the view in Washington DC from Jonathan Hillman of think tank the Centre for Strategic and International Studies. And the former Italian foreign affairs minister Giulio Terzi Sant'Agata explains why many of his compatriots are worried about the contents of the that memorandum.

(Picture: Italys Prime Minister Giuseppe Conte greets China's President Xi Jinping at Villa Madama in Rome; Credit: Alberto Pizzoli/AFP/Getty Images)

Can the continent remove trade barriers and create a billion-person internal market? That's the hope of the African Continental Free Trade Area, but a year on from its initial signing, many obstacles remain.

Nearly all of Africa's 55 nations have signed up to the initiative, yet the most populous country Nigeria remains a hold-out. And there still remain huge logistical barriers to free trade, as Will Bain discovers when he speaks to frustrated truckers on the Zambia-Botswana border.

Ed Butler speaks to Ghana's minister for trade Alan Kyerematen, as well as Pearl Uzokwe of the African conglomerate Sahara Group, and Alex Vines of London-based think tank Chatham House.

(Picture: Trucks drive along the Ethiopian side of the Ethiopia-Eritrea border; Credit: Michael Tewelde/AFP/Getty Images)

It is only 100 years since women in the UK were first allowed to practice law. Women now make up more than 50% of lawyers in many parts of the world, but why are so few in the top jobs? Katie Prescott speaks to Dana Dennis-Smith, who has collated the stories of women in the law over the last century. Farmida Bi of Norton Rose Fulbright, a huge international law firm, speaks about her journey from non-English speaking Pakistani child to global leader in her profession. We also hear from Shana Knizhnik, co-author of Notorious R.B.G: The Life and Times of Ruth Bader Ginsburg, about one of the most iconic women in the US legal profession.

(Photo: A statue of justice. Credit: Getty Images)

The lucrative business of 'essay mills' - companies that will write your university assignments for you. Chris makes thousands of dollars a year writing essays for fellow Chinese students struggling with English. Gareth Crossman from QAA - a UK education standards agency - says technology is facilitating the growing problem of essay mills.

(Photo: A stock image of a classroom assignment, Credit: Getty Images)

The economy of Russian occupied territories in Ukraine. Ed Butler reports on the people living between western Ukraine and the eastern occupied territories including the city of Donetsk, and the flow of goods and people across an active front line.

(Photo: Russian servicemen near the Crimean town of Dzhankoy, 12 miles away from the Ukrainian border, Credit: Getty Images)

How is the Scottish city of Aberdeen coping with the UK's imminent exit from the EU? It is home to the country's oil and gas industry, as well as some 5,000 fisherman.

Katie Prescott speaks to local businesspeople in both industries, who are increasingly anxious at the complete lack of certainty about what will happen when the UK does eventually leave - albeit that the date of departure has now been postponed by a few more weeks beyond 29 March.

How will European fishing quotas and access to British waters be decided post Brexit? And what will happen to Aberdeen's oil production, particularly as the flow of fossil fuels from under the North Sea begins to run dry? Aberdeen is the most vulnerable city in the UK to Brexit, according to Andrew Carter of research group, the Centre for Cities.

Producer: Sarah Treanor

(Picture: Fish at the Aberdeen fish market; Credit: BBC)

Would a Universal Basic Income help solve inequality or make it worse, and would it protect us from robots taking our jobs?

Finland has just completed a two-year experiment in doing just that. Manuela Saragosa speaks to one of the grateful recipients of the pilot project, freelance journalist Tuomas Muraja. A similar approach has already been taken for many years by some charities in the developing world, as Joe Huston of the GiveDirectly explains.

So how does it work? Anthony Painter of the Royal Society of Arts in London says the financial security it provides allows people to be more creative and invest more in themselves. But Professor Ian Goldin of Oxford University is sceptical, saying there are more effective and affordable ways of helping those most in need.

(Picture: Money falling on people; Credit: stocknroll/Getty Images)

To follow the world's headlines these days - from fake news to murderous terror attacks, from disease pandemics to global warming - you might be forgiven for thinking the world is becoming a pretty scary place. But is it really? Harvard University cognitive psychologist and author Steven Pinker tells us that is measurably not the case. As he argues in his new book Enlightenment Now, we are in a golden age of human existence.

But, David Edmonds meets academics who are putting Pinker's ideas to the test, concluding that with climate change and overpopulation, there is a 10% chance of humans not surviving the 21st Century.

(Photo: Activist at a climate change protest in Spain. Credit: Getty Images)