What a lot of dopers or drug users of any kind to do get money is sell it. That way they rope others into drug use, so they have enough for their own use without having to work a real job or run a real business, which often they have a hard time doing.
Addicts behave that way. People addicted to heroin, crack, meth, etc.
There is no physical addiction to cannabis. You need an example not born of the Reefer Madness era while have all been debunked endlessly.