Not long ago, a 27-year-old named Lucas Shaw went hunting for treasure.

He found it in his parents' basement.

Inside a dusty box were some prized possessions that Lucas hadn't thought about since grade school.

Something that was relatively worthless for 20 years is now worth their weight in gold, it seems like.

It was a collection of Pokemon trading cards, a collection that Lucas had obsessed over as a child,

and that Lucas as an adult now turned into a small fortune.

You know, I tried my hand in crypto, took some losses, tried my hand in some stocks.

But Pokemon cards was definitely my best investment.

And then just use that to splurge on things such as an engagement ring with three and a half

carrots of diamonds.

A sparkly diamond ring valued at $7,000, courtesy of some sparkly cardboard.

It is time to dig out your old Pokemon cards.

Pokemon trading cards are not just for kids anymore.

Pokemon cards can fetch tens of thousands of dollars when sold on eBay.

First edition cards have appreciated by, get this, over 10,000 percent.

Pokemon cards, based on the video game- global franchise about monsters that battle for glory,

have evolved into a speculative asset, one that's hotter than a flaming Charizard.

These cards have turned into an investment with a 3,000 percent return, and it's blazing past the SMP 500.

Welcome to The Journal, our show about money, business, and power.

I'm Jessica Mendoza. It's Monday, November 24th.

Coming up on the show, are Pokemon cards a nest egg or a bubble. I'll give it one more. You've come this far. Do not miss out on this incredibly rare card at 46. I will sell it to my advance bidder. Back in August, a sale took place at Heritage Auctions, an auction house where you can buy anything from

ancient coins to Andy Warholz. But on this day, thousands of dollars were pouring in for

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