Some of the occurrences that can plummet the price of Bitcoin is war as you mentioned, disease outbreak as we saw during the covid 19 pandemic, exchange bankruptcy for instance Mt gox, all these have significant impact on the price. On the other hand, what drives the price up is market sentiments. When the demand for Bitcoin is low, the price will go down and when the demand is high, the price will go up. Bitcoin halving and spot ETF listing are two important events that are capable of driving the price up.