“Will it make you smarter? (No) Will it make you nicer? (probably not) Will it make you richer? (Not a chance unless you are a dealer.) I’d recommend against it.”
There aren’t many activities I can think of that meet those criteria.
Well, reading will make you smarter. Going to church, praying, or working at a soup kitchen will make you nicer. Working will make you richer.
All of those activities are preferable to smoking pot.