I've seen the industry in the US, it is going to be massive if the tide turns in Canada (inevitable). You need to pick what part of the value chain you think will be most lucrative and find a way to invest in it. There will be some spectacular flame-outs and I would guess most of those will be old crappy mining shell companies on the TSX-V turned cannibus companies. I'm well versed in this sector and early stage in general, buyer beware.
"I believe that banking institutions are more dangerous to our liberties than standing armies. If the American people ever allow private banks to control the issue of their currency, first by inflation, then by deflation, the banks and corporations that will grow up around the banks will deprive the people of all property until their children wake-up homeless on the continent their fathers conquered."
-Thomas Jefferson 1802