Bitcoin trades around the clock on hundreds of exchanges across every time zone, so its price is essentially a live vote of confidence from millions of market participants simultaneously. When more people want to buy than sell at any given moment, price rises. When sellers outnumber buyers, it falls. Several things amplify these moves: large institutional funds entering or exiting positions, news about regulation or adoption, macroeconomic data releases like US inflation numbers, social media sentiment, and the actions of very large holders called whales. Unlike a stock market that closes at 4pm, there is no cooling-off period in crypto - the mood shift that happens at 3am on a Sunday in Asia still moves the price.