We've talked about some of the unique challenges facing legitimate United States-based cannabis companies – challenges that come from its illegal status at the federal level.

Banking is one challenge; marijuana firms in the states have an incredibly difficult time accessing those services for fear of running afoul of Uncle Sam's money laundering statutes.

Achieving a listing on the Nasdaq or New York Stock Exchange is another problem – and one with even more of an impact on investors. It effectively cuts off the company and its shareholders from the $20 trillion in capital that trades in the "big leagues."

Most American marijuana firms have to offer shares "on the pink sheets," in the smaller, markedly less liquid over-the-counter markets.

The other day, I showed you one U.S. cannabis company that took an ingenious "shortcut" route through a wall of red tape to list on the Nasdaq; it's the dawn of what I called a "$20 trillion tomorrow."

That tomorrow may come sooner than anyone realizes – because another American marijuana firm is making a play for its Nasdaq listing.