@Md Hafiz. Of course you dont know why. Because investor like you never see the big picture. If times can goes back to 2010. You will say the same thing to Tesla Investor.
"Hello, there are many companies that are better then Tesla. Companies like BMW, Audi, Ford, Mercedes with 30 - 50 years of experience, who is Elon Musk? Is he dreaming on his Space X Project?"
If you dont believe, just go away. Don't even look or think about it like you are very smart.