The rise and fall of bitcoin depends on the demand for the coin, have ever heard of the story of whales, they predict the price of bitcoin by the movement of large amount of bitcoins,say there is that case of huge amounts of money being transferred to bitcoin, then you can predict the price, and if a sell of of a large amount of bitcoin then that can cause a fall in price, and also if you check on what is happening, an endorsement of the same can increase the price.