What are the Pros/Cons of Smoking Weed and Should I?

I Dont Know alot of my friends do and i dont. They make it seem like its not that bad because they havent changed that much after doing it other than being like obsessed with it. Idk they said its kinda good for you and its fun. But i think that it might kill brain cells, become an addiction, get me and my parents and trouble, and be bad for my asthma, not to mention that it cost a TON of money overtime. What are your opinions?