There are certain occurrences that can reduce or bring down the economy of a particular Nation there by also making there currency lose value in the world market for example war.
War causes the most impact on all sectors and what is most felt is the disruption of the economic sector. War is an event that all rational humans least want. As a result of war, all order is broken.
And there are also certain occurrences that can increase or rise the economy of a particular Nation there by also making there currency gain more value in the world market for example emergence of good and intelligent government.
Therefore I believe there are certain occurrences that will increase the price of Bitcoin to a very magnificent price.
The most basic of certain events that can increase or decrease a price is the need for an item. If demand increases, the quantity of stock decreases, the price will increase. Global market behavior depends on their role [stakeholders] as actors in playing their roles.
Regarding the increase and decrease in the price of Bitcoin, it is no different from what I said above, that it really depends on supply and demand. An event that occurs can be the cause behind rising and falling prices.