My friend L wants to live out of a van.

For the moment, she works for Whole Foods and walks dogs for extra cash. The rest of the time, though, she climbs — indoors or outdoors, it doesn’t matter.

Every time she’s able to put together a few days of paid time off … she’s off scaling mountains in Kentucky, West Virginia, Tennessee or Colorado.

And now she’s ready to take this hobby to the next step.

A month ago, L told me she’s going to commit to climbing — all the time. That means living out of a van, one she’s been outfitting herself. It’ll have a bed, a mini-kitchen, gear storage — everything she’ll need to live life on the open road.

Now this might seem like an unusual choice, but L is 25 — she’s a millennial. And her generation is increasingly able to make decisions like these because millennials are incredibly adept at exploiting the new technologies that make them possible.

In fact, these technologies are setting up to make investors a fortune…

One of the potentially biggest technologies that L will be taking advantage of is mobile banking.

The reason is simple: Since she’s living on the road, she’s going to need to “gig” for money while she travels.

A gig is a job with no employment arrangement. That could mean quickly helping someone with a fast home-construction project or acting as a research assistant to people like me who need information quickly for an issue. Other gigs are more sophisticated, like writing a small part of a computer program.

In some instances, your client could be someone in Singapore, Dubai, New York or London.

After you complete the gig and it comes time to be paid, the client simply sends you the money using a smartphone app, such as Venmo, PayPal or Dwolla. So it’s easy for people like L to make money while they’re traveling in pursuit of their passions.

As a result, this type of payment platform is gaining wild popularity.

Follow the Millennial Money

Remember, L isn’t the only one doing this. Her entire generation — the millennial generation — sees this way of living as a viable option because they’ve grown up with smartphones and the Internet, which have become just as vital as electricity and water to them.

As you may know, millennials are between the ages of 18 and 34 today. This generation numbers a whopping 92 million people in just the U.S. alone. That makes it the largest generation in history, overtaking the baby-boom generation, which numbers 77 million.

Globally, the millennial generation is estimated to be as large as 2 billion people strong.

And many of the habits of U.S. millennials are shared by their peers in Australia, the United Kingdom, China, India, Brazil, Russia, etc.

In other words, if you travel, it won’t take you long before you run into a millennial who, like my friend L, is pursuing a passion — in outdoor rock climbing, surfing, scuba diving, mountaineering, volunteering, etc.

Most of them depend on mobile payments to get paid while they pursue their passion. And other millennials who are still rooted in one place use these services as well. They may use a platform such as PayPal for everyday activities, such as transferring money to a friend or paying for their Uber rides.

In fact, a recent survey showed that 15% of millennials use mobile payments multiple times per day. Another 10% use it once a day. And 29% use it several times in a week.

It’s no wonder then that mobile payment growth is skyrocketing higher. For 2016, growth is expected to hit 183.3% — and it’s expected to double in 2017. By 2020, total transactions are expected to hit $314 billion, growth of 1,034%!

That’s where you want to be as an investor — in explosive growth trends just like that.