Supply and demand determines the bitcoin price.
Actually, the price of bitcoin was depend on supply and demand on online market. The price of bitcoin is volatile and we all know that it always chane and I guess the main why bitcoin change its price is the fluctuation of supply and demand on online market. But still the no can predict what would be the price of bitcoin.
Yes right the prices are dependent on behavior of investor demand, if demand id low the bitcoin will face dump and investor will be panic, and if the new investors comes to it the prices will automatically to the rise and the beneficial situation for the investor is the new comers and new investors as they keep coming bitcoin will go up to the 10000USD+.
I agree with you its all dependent investor behavior .for example if investor think the price of bitcoin dump now this is good time for buying bitcoin the mind of investor think about become future how many profit get it there are too many investor they look for good time to buy bitcoin its all dependent investor