No, your initial $15 investment would be worth $200.
You selling your shares is just you liquidating your assets: you have $200, you're just turning it into cash.
shyt like Tesla has made massive leaps in price, as have shares in Facebook, Google, etc, over time.
Its not nearly as difficult as it seems, there's just heavy research and speculation involved, alongside a risk.
That is why investors tell the avg. Joe, who doesn't have the time or knowledge, to invest in mutual funds.
That way you are paying a (small) fee for professionals to do all the research, and there is also less risk due to diversity.