This week Tech Tent takes the temperature of the crypto market with the BBC's cyber reporter Joe Tidy and the Financial Times' Markets Editor, Katie Martin. Dr Johnny Ryan from the Irish Council for Civil Liberties on how our personal data is sold hundreds of times a day; and Rebecca Romo Teague, a radio host from Cape Cod, on how social media is helping with the US baby formula milk crisis.

Tech Tent speaks to Marcus Hutchins, the British cyber security expert who singlehandedly stopped the Wannacry attack. The BBC's cyber reporter Joe Tidy and the cyber expert Lisa Forte discuss Wannacry's legacy. Also this week why Russians are resorting to medieval memes to express dissent about the war in Ukraine, how Tiktok is transforming Eurovision, and Tony Fadell, inventor of the Ipod reflects on the announcement it's being discontinued.

Meta announcing plans for a Metaverse has intensified interest in virtual and augmented reality. But does the hardware and content match the marketing hype? Tech Tent hears from Alex Counsell, Technical Director at the newly opened Centre for Creative and Immersive & eXtended Realities. Tech expert Kate Bevan talks about scammers using shared screen programmes. And Bill Gates gives his thoughts about the future of the tech industry - and his feud with Elon Musk.

On the programme this week, Brooke Erin Duffy of Cornell University returns to give her assessment of Twitter's new owner. The MEP Arba Kokalari explains the new tougher approach Europe is taking to regulating tech. And wine drinkers see if they can tell the difference between a real sommelier and an AI one.

Tech Tent speaks to Julian Aquilina, from Enders analysis, on how serious a blow Netflix's loss of subscribers is. James Clayton checks back in with an update on Elon Musk and Twitter. And our technology reporter Shiona McCallum has been speaking to an astronaut.

A controversial facial recognition company helps identify the dead in Ukraine. And a look at whether age verification tech can stop children viewing pornography online.

This week, Tech Tent speaks to Professor Brooke Erin Duffy about what Elon Musk investing in Twitter could mean for the social platform. The curator of TED, Chris Anderson, gives details about the return of the conference in person. And Kay Wackwitz, from Drone Industry Insights, considers a major expansion of deliveries by unmanned aircraft in the US.

We report on the latest high-profile, high value theft of cryptocurrency. David Canellis, from the website, Protos, analyses what happened. The space expert Dr Teasel Muir-Harmony explains why the US and Russia continue to co-operate over the International Space Station. And Alex Bornyakov, the Deputy Minister of Digital Transformation of Ukraine, describes how tech workers there are taking the fight to Russia.

This week's episode features an interview with Wendy Betts, who is involved with an app developed for war crimes investigators. John Hultquist, who’s Vice President of the cyber security firm, Mandiant, speaks about the cyber threat Russia poses to the US. And Tom Gerken reports on the millions of dollars raised by people playing Fortnite for the Ukrainian humanitarian effort.

This week's guests include Ina Burgstaller, who set up an online service for victims of the war needing medical treatment. One of the volunteer medics, Dr Lawrence Barnes also explains why he got involved. We hear about the lift-sharing scheme dubbed Uber for refugees, helping to get Ukrainians to safety. And a new trial to see if gaming can ease pain.