There’s a hot new fad on Wall Street that’s stoking big returns.

Marijuana stocks from Canada are all the rage on American exchanges.

Investors have clearly taken notice. The returns are piling up faster than Domino’s boxes at 2 a.m. at a frat party. In fact, it’s become quite the dilemma for many seasoned investors: Should I or Shouldn’t I?

Up north, progressive hipster Justin Trudeau is leading Canada to fully legalize the recreational use of marijuana on Oct. 17 under the Cannabis Act.

The Canadians would be only the second country to legalize the recreational use of pot; Uruguay was first, but Canada is a far bigger market and global presence than Uruguay.

Numerous Canadian cannabis companies like Tilray and Canopy Growth have seen their stocks driven up more than 100 percent in a frenzy of buying excitement fueled by Canada’s legalization.

Tilray, which just went public July 19, in six weeks is up about 375 percent — and that includes a downgrade!

Many of these companies are setting up substantial operations in the US to be ready should Congress legalize the use of recreational marijuana. And it’s looking like there is some bipartisan support for it.

Many believe marijuana is the “next big thing,” almost like bitcoin was for a year or two. But there’s a difference.

Since cannabis does have medicinal value, there is already a market that can help determine recreational “street value,” as well as built-in pricing in the states where it is legal.

Bitcoin, despite a similarly stunning rise and attraction to individual investors, proved difficult to value and burned a lot of people while making some rich.

If marijuana is legalized in the US, I would think the ceiling is very high.

But cannabis investors could also hit quite a crash, like late bitcoin investors did.

How high is too high for weed stocks? Who knows?