It’s hard to disappear these days. Everything from renting property and using a credit card to working a job leaves a digital footprint. But just because it’s hard to vanish from the virtual world doesn’t mean people aren’t trying. Some do it out of necessity, to escape violence or persecution. Others do it out of curiosity, pursuing total anonymity just to see how far they can take things. Marketplace’s Lily Jamali spoke with Hal Triedman, a privacy engineer who recently wrote about the “extreme privacy” community for the online magazine Reboot.

AI can be used for unsavory things, like any technology. But researchers at the nonprofit Global Fishing Watch have revealed a promising use case — enlisting AI to accurately track human activity on the oceans, according to its new study published in the journal Nature. There’s a lot out there that has long floated under the radar of monitoring systems, including the so-called dark fleets involved in illegal and unregulated fishing. Marketplace’s Lily Jamali spoke with David Kroodsma, director of research and innovation at Global Fishing Watch, about the group’s work.

It’s been almost two weeks since several investment products tied to bitcoin started trading on old-school financial markets. These bitcoin ETFs have made it easier for everyday investors to place bets on the crypto market, and in the days since federal regulators gave the green light, investors have poured nearly $2 billion into the new bitcoin funds. But probably not the crypto purists, says Joel Khalili, who reports on the industry for Wired. Marketplace’s Meghan McCarty Carino spoke with Khalili about crypto early adopters, who, he says, are quite happy to stay on the fringes of the financial system.

On the show today, the Food and Drug Administration expanded its approval for CRISPR gene-editing therapies. We look at the affordability of these treatments, which can cost well into the millions of dollars. Plus, is bad marketing stunting health tech companies? More on how startups can up their game. But first, at this week’s World Economic Forum in Davos, Switzerland, there were 32 scheduled events devoted to AI. When they weren’t comparing private jets, business executives were busy asking, “How do you make money off AI?” Marketplaces’ Lily Jamali is joined by Christina Farr, a health tech investor at OMERS Ventures, for her take on these stories.

The Securities and Exchange Commission’s recent approval of spot bitcoin exchange-traded funds means that for the first time, people can invest in funds that include bitcoin with no crypto wallet required. Demand for the original cryptocurrency is only expected to grow, and bitcoin mining operators are in position to satisfy it. Two years ago, Marketplace’s Lily Jamali visited one in upstate New York. Stacks of computers burned through tons of power to generate new bitcoins, she reported. Texas is now a preferred hub, and Ben Hertz-Shargel of the consultancy Wood Mackenzie says the SEC’s move will be felt there.

While Marketplace’s Lily Jamali was at CES last week in Las Vegas, she took her first ride on the Vegas Loop, built by Elon Musk’s the Boring Co. In 2013, Musk floated the concept of a hyperloop as a way for people to travel long distances at superfast speeds via pods in vacuum-sealed tubes. The Vegas Loop, as Lily found out, is not that. Developing actual hyperloop technology is hard and costly. Just ask Hyperloop One, a startup that recently shut down after a decade of trying. Lily recently spoke with Bloomberg’s Sarah McBride about Hyperloop One’s demise and what it means for the tech sector’s larger ambition to create hyperloop transport systems.

One consequence of climate change is more frequent and severe droughts. And that has water-stressed communities looking for new sources of drinking water. Today, Marketplace’s climate podcast “How We Survive” and host Amy Scott take a look at how technology can help.

Last year, the University of Michigan’s National Poll on Healthy Aging found that 1 in 3 adults between 50 and 80 years old said they felt isolated. Enter ElliQ, the robot companion created to alleviate loneliness in older adults. She’s programmed to be inquisitive and empathetic and is designed to sit in your home and keep you company. Marketplace’s Lily Jamali spoke with Dor Skuler, CEO and co-founder of Intuition Robotics, about why he thinks a robot is the right tool to address loneliness.

On the show today, tech investors are among the 100,000-plus people who’ve descended on Las Vegas for this year’s CES. They’re looking for the next big thing in tech and trying to make sure they don’t throw money at the next big dud. Plus, CES showcases the latest in age tech — products meant to make getting older easier, more comfortable and less lonely. But first, artificial intelligence is a big theme at the gathering this year, and the technology is becoming a regular part of people’s work lives. That’s according to a new survey from Tech.co. Marketplace’s Lily Jamali is joined by Jewel Burks Solomon, managing director at Collab Capital, and Katie Roof, reporter at Bloomberg, for their take on these stories.

We’re a few days into CES now, and amid the demos, launches, meeting, greeting, keynotes and all the walking, there’s one thing on a lot of people’s minds: sleep. So, Marketplace’s Lily Jamali stopped by the National Sleep Foundation’s booth to meet some folks there thinking about sleep. She spoke with Biquan Luo, co-founder and CEO of Lumos Tech, whose company makes what looks like a regular sleep mask, but has embedded LED lights. It’s designed to help recalibrate a user’s sleep schedule.