Though bitcoin have it's own system for its transactions it still function like the stocks in stock market.
The price is driven by the demand of the public.
The more people who are willing to pay for it will increase it's price. And the less people who want it will contribute to the decrease in it's price.

But even though the two is quite similar studying one of those is still a tedious thing to do. As it requires lots of experience and practice that comes along with the time you are investing in it.