Bitcoin Rainbow Wave 1W chart maps 4-year cycles. ATHs marked in 2017, 2021, projected 2025 and 2027. BuyZones highlighted: 2018, 2022, and next 2026. Each cycle follows rising log bands with diminishing returns. Pattern suggests BTC bottoms in BuyZones, then rallies to new ATHs. If history repeats, 2025 targets new highs, with 2026 as the next major accumulation before 2027. #bitcoin