When Napoleon ruled France in the early 1800s, California was a wild frontier region – home to just a handful of pioneers.

But last year, California overtook once-mighty France in the rankings of the world’s largest economies, coming in at sixth place.

The International Monetary Fund says California’s GDP is worth roughly $2.5 trillion, buoyed by agriculture, tourism, aerospace, and, of course, Silicon Valley and high tech.

The vast scale of economic opportunity in the Golden State is incredibly important for another big reason. That huge GDP will help serve as a key “trigger” – or catalyst – in the breakout legal cannabis.

Starting Jan. 2, California is all set to make recreational use of marijuana for adults fully legal. Simply stated, we’ve never seen anything this big happen in the legal cannabis industry.

That’s why I’m headed south to Anaheim this week to attend the California Cannabis Business Conference later this week, where some 350 firms will be represented.

To give you the inside edge, I’ve spoken with the group’s leaders.

Today I’ll be share their insights with you.

They foresee a more than $20 billion impact in just the next four years alone.

That’s why I’ll also show you the single best move you can make to get a slice of that huge pie…

I’m sick of them already.

Since about midyear, every morning I open my email box after eating breakfast and settling down at my desk.

And each and every morning that inbox is filled with “big opportunities.”

No I’m not talking about notes from Nigerian princes or offers to refinance my home. My spam filter catches just about all of those.

These notes come in from washed-up boxers, former beauty queens, aging reality-TV stars, and other bottom-rung celebrities – and they’re all pitching chances to “invest” in the latest initial coin offering (ICO). (Yes, I purposefully used “scare quotes” there.)

I’m sure your inboxes’ are filled with similar garbage – or maybe it comes through your kids’ social-media accounts.

Either way, I can’t wait till this fad dies down some.

Now, don’t get me wrong. I’m not saying you can’t make money on ICOs. After all, they are based on digital currencies like Bitcoin – our “Gold of Tech” portfolio insurance. I’ve been immersed in Bitcoin virtually since it launched, and I remain a big backer of.it, no matter what Jamie Dimon says.

The reason I want to talk to you about ICOs today is to make sure you understand what they are – and to make sure you don’t get taken for a ride.

With that in mind, I’m going to show you the one thing you should do before investing in any ICO.

With it, you’ll protect your hard-earned money and bolster your net worth…