Buy a pound of weed for $1500, flip it for $4000-5000, rinse and repeat.
Or if you want to make some real money, buy clones for 5$, each one of them will give you around a qp depending on the strain, $5 turns into $1500, you just need to wait, they say money does not grow on tree`s but they lied.

psst it is legal here where I live ^_^, just sell one ounce at a time and don`t say your selling it you are "sharing" it.
https://www.justice.gc.ca/eng/cj-jp/cannabis/ "share up to 30 grams"

Now buy a full bitcoin.