For those who needed a friendly reminder, stocks can go down, too. On Monday, the growth-oriented Nasdaq Compositeofficially dipped into correction territory, with a loss of 10.5% since its Feb. 12 high. Corrections and crashes, as much as we might dislike them as investors, are a natural part of the investing cycle.

More importantly, sizable dips in the major indexes create excellent opportunities for long-term investors to put their money to work in the world's greatest wealth creator. Considering that time is the greatest ally that investors have, the following four surefire stocks all have the potential to turn their shareholders into millionaires.

Marijuana promises to be one of the fastest-growing industries this decade. But there's a pretty big difference in the long-term outlook between the Canadian and U.S. pot stocks. As the largest cannabis market in the world, the U.S. holds a clear competitive edge. That's why U.S. multistate operator (MSOs) Cresco Labs(OTC:CRLBF) is the one I'd term a millionaire-maker.