The statement is strongly supported by multiple credible, academic sources. Evidence 1, 3, 5, 6, and 7 directly reference the analysis of Bitcoin's 'one-minute price data' or 'minute price returns,' confirming that fluctuations at this timescale are a known and studied phenomenon. Additionally, sources related to trading strategies (10, 12) explicitly mention using 1-minute charts for day trading and scalping, which are methods that rely on frequent and sharp price movements.