Bitcoin's current trends mimic its successful years of 2016 and 2020, yet demand has stagnated since July.US spot ETFs, particularly BlackRock’s IBIT, drive demand by adding significant Bitcoin holdings.Despite substantial outflows from Grayscale’s GBTC, the US funds collectively hold over US$56 billion in Bitcoin.Analyst Willy Woo forecasts a delayed Bitcoin ATH, expecting sideways movement through late year but remains bullish long-term.