While many marijuana stocks fall have small market caps, investors are not stuck investing in marijuana penny stocks, though those can be very profitable. For investors looking for the one of the best marijuana stock to invest in, while ACB stock may be the more enticing option, their best bet could be Canopy Growth Corp (TSE:WEED). The first billion-dollar market cap weed company, Canopy Growth has a lot of the makings of a great and stable industry leader. While other companies have faced controversies on everything from pesticides used in growing operations to possible shutdowns,